./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/mbpr3.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_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/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_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/mbpr3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/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_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/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 a50e57e46342104030586dde3ea26bc2e3984490f4fdef34fa383d24842d8980 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:31:40,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:31:40,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:31:40,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:31:40,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:31:40,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:31:40,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:31:40,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:31:40,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:31:40,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:31:40,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:31:40,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:31:40,945 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:31:40,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:31:40,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:31:40,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:31:40,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:31:40,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:31:40,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:31:40,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:31:40,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:31:40,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:31:40,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:31:40,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:31:40,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:31:40,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:31:40,989 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:31:40,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:31:40,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:31:40,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:31:40,995 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:31:40,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:31:40,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:31:41,003 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:31:41,004 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:31:41,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:31:41,005 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:31:41,005 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:31:41,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:31:41,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:31:41,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:31:41,008 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:31:41,053 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:31:41,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:31:41,056 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:31:41,056 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:31:41,063 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:31:41,063 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:31:41,064 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:31:41,064 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:31:41,064 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:31:41,064 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:31:41,065 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:31:41,066 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:31:41,066 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:31:41,066 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:31:41,066 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:31:41,067 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:31:41,067 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:31:41,067 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:31:41,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:31:41,069 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:31:41,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:31:41,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:31:41,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:31:41,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:31:41,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:31:41,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:31:41,072 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:31:41,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:31:41,072 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:31:41,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:31:41,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:31:41,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:31:41,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:31:41,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:31:41,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:31:41,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:31:41,074 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:31:41,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:31:41,075 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:31:41,075 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:31:41,075 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:31:41,075 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_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50e57e46342104030586dde3ea26bc2e3984490f4fdef34fa383d24842d8980 [2021-11-21 01:31:41,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:31:41,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:31:41,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:31:41,425 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:31:41,426 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:31:41,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-tiling/mbpr3.c [2021-11-21 01:31:41,495 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/data/885792864/5b1b83c05ce44314af6aa0e67efbe17e/FLAG0738e93eb [2021-11-21 01:31:41,965 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:31:41,966 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/sv-benchmarks/c/array-tiling/mbpr3.c [2021-11-21 01:31:41,973 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/data/885792864/5b1b83c05ce44314af6aa0e67efbe17e/FLAG0738e93eb [2021-11-21 01:31:42,344 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/data/885792864/5b1b83c05ce44314af6aa0e67efbe17e [2021-11-21 01:31:42,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:31:42,349 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:31:42,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:31:42,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:31:42,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:31:42,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:31:42" (1/1) ... [2021-11-21 01:31:42,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7761b886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:42, skipping insertion in model container [2021-11-21 01:31:42,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:31:42" (1/1) ... [2021-11-21 01:31:42,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:31:42,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:31:42,593 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_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/sv-benchmarks/c/array-tiling/mbpr3.c[396,409] [2021-11-21 01:31:42,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:31:42,656 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:31:42,681 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_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/sv-benchmarks/c/array-tiling/mbpr3.c[396,409] [2021-11-21 01:31:42,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:31:42,744 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:31:42,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:42 WrapperNode [2021-11-21 01:31:42,745 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:31:42,747 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:31:42,747 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:31:42,747 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:31:42,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:42" (1/1) ... [2021-11-21 01:31:42,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:42" (1/1) ... [2021-11-21 01:31:42,819 INFO L137 Inliner]: procedures = 15, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 107 [2021-11-21 01:31:42,821 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:31:42,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:31:42,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:31:42,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:31:42,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:42" (1/1) ... [2021-11-21 01:31:42,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:42" (1/1) ... [2021-11-21 01:31:42,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:42" (1/1) ... [2021-11-21 01:31:42,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:42" (1/1) ... [2021-11-21 01:31:42,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:42" (1/1) ... [2021-11-21 01:31:42,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:42" (1/1) ... [2021-11-21 01:31:42,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:42" (1/1) ... [2021-11-21 01:31:42,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:31:42,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:31:42,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:31:42,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:31:42,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:42" (1/1) ... [2021-11-21 01:31:42,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:31:42,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:31:42,925 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:31:42,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:31:42,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:31:42,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:31:42,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:31:42,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:31:42,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:31:42,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:31:42,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:31:42,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:31:43,035 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:31:43,037 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:31:43,354 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:31:43,441 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:31:43,445 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-21 01:31:43,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:31:43 BoogieIcfgContainer [2021-11-21 01:31:43,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:31:43,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:31:43,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:31:43,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:31:43,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:31:42" (1/3) ... [2021-11-21 01:31:43,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47133094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:31:43, skipping insertion in model container [2021-11-21 01:31:43,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:42" (2/3) ... [2021-11-21 01:31:43,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47133094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:31:43, skipping insertion in model container [2021-11-21 01:31:43,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:31:43" (3/3) ... [2021-11-21 01:31:43,457 INFO L111 eAbstractionObserver]: Analyzing ICFG mbpr3.c [2021-11-21 01:31:43,462 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:31:43,463 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:31:43,518 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:31:43,526 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:31:43,526 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:31:43,543 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 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 01:31:43,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 01:31:43,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:31:43,550 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:31:43,550 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:31:43,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:31:43,557 INFO L85 PathProgramCache]: Analyzing trace with hash 383781863, now seen corresponding path program 1 times [2021-11-21 01:31:43,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:31:43,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110719856] [2021-11-21 01:31:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:43,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:31:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:31:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:31:44,008 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:31:44,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110719856] [2021-11-21 01:31:44,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110719856] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:31:44,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:31:44,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:31:44,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860199431] [2021-11-21 01:31:44,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:31:44,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:31:44,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:31:44,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:31:44,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:31:44,065 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 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) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:31:44,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:31:44,164 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2021-11-21 01:31:44,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:31:44,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-21 01:31:44,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:31:44,176 INFO L225 Difference]: With dead ends: 28 [2021-11-21 01:31:44,177 INFO L226 Difference]: Without dead ends: 12 [2021-11-21 01:31:44,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:31:44,187 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:31:44,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 13 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:31:44,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-21 01:31:44,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-21 01:31:44,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:31:44,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2021-11-21 01:31:44,225 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 9 [2021-11-21 01:31:44,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:31:44,226 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-11-21 01:31:44,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:31:44,248 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2021-11-21 01:31:44,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:31:44,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:31:44,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:31:44,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:31:44,249 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:31:44,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:31:44,250 INFO L85 PathProgramCache]: Analyzing trace with hash 308643540, now seen corresponding path program 1 times [2021-11-21 01:31:44,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:31:44,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827535854] [2021-11-21 01:31:44,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:44,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:31:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:31:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:31:44,552 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:31:44,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827535854] [2021-11-21 01:31:44,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827535854] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:31:44,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:31:44,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:31:44,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166674640] [2021-11-21 01:31:44,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:31:44,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:31:44,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:31:44,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:31:44,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:31:44,559 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:31:44,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:31:44,606 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2021-11-21 01:31:44,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:31:44,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 01:31:44,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:31:44,609 INFO L225 Difference]: With dead ends: 20 [2021-11-21 01:31:44,609 INFO L226 Difference]: Without dead ends: 14 [2021-11-21 01:31:44,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:31:44,618 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:31:44,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 7 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:31:44,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-21 01:31:44,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-21 01:31:44,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:31:44,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-21 01:31:44,634 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 10 [2021-11-21 01:31:44,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:31:44,636 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-21 01:31:44,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:31:44,637 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-21 01:31:44,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 01:31:44,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:31:44,644 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:31:44,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:31:44,644 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:31:44,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:31:44,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1611323004, now seen corresponding path program 1 times [2021-11-21 01:31:44,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:31:44,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697927650] [2021-11-21 01:31:44,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:44,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:31:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:31:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:31:45,151 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:31:45,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697927650] [2021-11-21 01:31:45,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697927650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:31:45,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148584044] [2021-11-21 01:31:45,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:45,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:31:45,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:31:45,159 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:31:45,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:31:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:31:45,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 01:31:45,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:31:45,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 74 [2021-11-21 01:31:45,539 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 7 treesize of output 3 [2021-11-21 01:31:45,571 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 49 treesize of output 38 [2021-11-21 01:31:45,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:45,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:45,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:45,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:45,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 29 treesize of output 29 [2021-11-21 01:31:45,749 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-21 01:31:45,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 114 treesize of output 122 [2021-11-21 01:31:45,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:45,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2021-11-21 01:31:45,824 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 79 treesize of output 66 [2021-11-21 01:31:45,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:45,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:45,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:45,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:45,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:45,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:45,860 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-11-21 01:31:45,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 50 [2021-11-21 01:31:46,158 INFO L354 Elim1Store]: treesize reduction 147, result has 21.0 percent of original size [2021-11-21 01:31:46,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 129 treesize of output 152 [2021-11-21 01:31:46,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 26 [2021-11-21 01:31:46,261 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 91 treesize of output 76 [2021-11-21 01:31:46,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:46,322 INFO L354 Elim1Store]: treesize reduction 98, result has 16.9 percent of original size [2021-11-21 01:31:46,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 65 [2021-11-21 01:31:46,564 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-21 01:31:46,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 72 [2021-11-21 01:31:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:31:46,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:31:46,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:31:46,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 160 treesize of output 160 [2021-11-21 01:31:46,896 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 13 treesize of output 4 [2021-11-21 01:31:46,933 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 13 treesize of output 4 [2021-11-21 01:31:46,949 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 152 treesize of output 132 [2021-11-21 01:31:46,970 INFO L354 Elim1Store]: treesize reduction 89, result has 5.3 percent of original size [2021-11-21 01:31:46,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 380 treesize of output 297 [2021-11-21 01:31:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:31:47,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148584044] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:31:47,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1736250054] [2021-11-21 01:31:47,125 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:31:47,125 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:31:47,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:31:47,143 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:31:47,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:31:47,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:47,255 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:31:47,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:31:47,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:47,292 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 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 01:31:47,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:47,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 105 [2021-11-21 01:31:47,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:47,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-11-21 01:31:47,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:47,590 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 63 treesize of output 53 [2021-11-21 01:31:47,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:47,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:47,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:47,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:47,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 43 treesize of output 43 [2021-11-21 01:31:47,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:47,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:47,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:47,897 INFO L354 Elim1Store]: treesize reduction 116, result has 26.1 percent of original size [2021-11-21 01:31:47,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 331 treesize of output 363 [2021-11-21 01:31:48,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:48,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:48,364 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-11-21 01:31:48,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 206 treesize of output 195 [2021-11-21 01:31:48,656 INFO L354 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2021-11-21 01:31:48,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 242 treesize of output 226 [2021-11-21 01:31:48,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:48,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:48,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:48,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:48,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:48,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:48,687 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-21 01:31:48,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 213 [2021-11-21 01:31:49,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:31:49,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:31:49,238 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 12 treesize of output 3 [2021-11-21 01:31:49,249 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 72 treesize of output 61 [2021-11-21 01:31:49,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:31:49,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 67 [2021-11-21 01:31:49,544 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 9 treesize of output 3 [2021-11-21 01:31:49,565 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 43 treesize of output 32 [2021-11-21 01:31:49,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 29 [2021-11-21 01:31:49,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,689 INFO L354 Elim1Store]: treesize reduction 52, result has 37.3 percent of original size [2021-11-21 01:31:49,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 145 [2021-11-21 01:31:49,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:31:49,826 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 34 treesize of output 34 [2021-11-21 01:31:49,855 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 89 treesize of output 76 [2021-11-21 01:31:49,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,879 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-21 01:31:49,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 60 [2021-11-21 01:31:50,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:31:50,128 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:31:50,162 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 12 treesize of output 3 [2021-11-21 01:31:50,177 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 72 treesize of output 61 [2021-11-21 01:31:50,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:31:50,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:31:50,462 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 12 treesize of output 3 [2021-11-21 01:31:50,494 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 72 treesize of output 61 [2021-11-21 01:31:50,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:31:50,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 141 [2021-11-21 01:31:50,706 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 93 treesize of output 80 [2021-11-21 01:31:50,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 64 [2021-11-21 01:31:50,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 34 [2021-11-21 01:31:50,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:31:50,961 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:31:50,984 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 12 treesize of output 3 [2021-11-21 01:31:51,006 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 72 treesize of output 61 [2021-11-21 01:31:51,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:51,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:51,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:51,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:51,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:31:51,759 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:31:52,202 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:31:52,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:31:52,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 6] total 23 [2021-11-21 01:31:52,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269904474] [2021-11-21 01:31:52,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:31:52,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-21 01:31:52,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:31:52,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-21 01:31:52,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-11-21 01:31:52,208 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:31:56,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:31:56,494 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-11-21 01:31:56,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 01:31:56,494 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-21 01:31:56,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:31:56,495 INFO L225 Difference]: With dead ends: 26 [2021-11-21 01:31:56,495 INFO L226 Difference]: Without dead ends: 24 [2021-11-21 01:31:56,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:31:56,497 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:31:56,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 27 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 83 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2021-11-21 01:31:56,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-21 01:31:56,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2021-11-21 01:31:56,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:31:56,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-21 01:31:56,502 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 12 [2021-11-21 01:31:56,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:31:56,503 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-21 01:31:56,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:31:56,503 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-21 01:31:56,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 01:31:56,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:31:56,504 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:31:56,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:31:56,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-21 01:31:56,705 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:31:56,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:31:56,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1931181345, now seen corresponding path program 1 times [2021-11-21 01:31:56,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:31:56,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699291474] [2021-11-21 01:31:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:56,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:31:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:31:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:31:56,962 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:31:56,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699291474] [2021-11-21 01:31:56,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699291474] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:31:56,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627721169] [2021-11-21 01:31:56,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:56,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:31:56,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:31:56,967 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:31:56,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:31:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:31:57,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 01:31:57,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:31:57,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 70 [2021-11-21 01:31:57,139 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 9 treesize of output 3 [2021-11-21 01:31:57,151 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 43 treesize of output 32 [2021-11-21 01:31:57,193 INFO L354 Elim1Store]: treesize reduction 168, result has 13.0 percent of original size [2021-11-21 01:31:57,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 58 treesize of output 66 [2021-11-21 01:31:57,225 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-21 01:31:57,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 23 [2021-11-21 01:31:57,317 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-21 01:31:57,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 116 treesize of output 126 [2021-11-21 01:31:57,346 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 87 treesize of output 74 [2021-11-21 01:31:57,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:57,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:57,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:57,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:57,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:57,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:57,371 INFO L354 Elim1Store]: treesize reduction 48, result has 15.8 percent of original size [2021-11-21 01:31:57,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 58 [2021-11-21 01:31:57,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:57,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 16 [2021-11-21 01:31:57,605 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-21 01:31:57,606 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 93 treesize of output 66 [2021-11-21 01:31:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:31:57,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:31:57,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:31:57,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 164 treesize of output 164 [2021-11-21 01:31:57,863 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 13 treesize of output 4 [2021-11-21 01:31:57,918 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 13 treesize of output 4 [2021-11-21 01:31:57,941 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 156 treesize of output 136 [2021-11-21 01:31:57,956 INFO L354 Elim1Store]: treesize reduction 95, result has 5.0 percent of original size [2021-11-21 01:31:57,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 834 treesize of output 669 [2021-11-21 01:31:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:31:58,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627721169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:31:58,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [242871126] [2021-11-21 01:31:58,082 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:31:58,082 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:31:58,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:31:58,083 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:31:58,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:31:58,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:58,161 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:31:58,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:31:58,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:58,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 01:31:58,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:58,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 133 [2021-11-21 01:31:58,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:58,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 14 [2021-11-21 01:31:58,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:58,458 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 86 treesize of output 76 [2021-11-21 01:31:58,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:58,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:58,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:58,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:58,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 60 treesize of output 54 [2021-11-21 01:31:58,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:58,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:58,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:58,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:58,710 INFO L354 Elim1Store]: treesize reduction 85, result has 15.0 percent of original size [2021-11-21 01:31:58,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 334 treesize of output 359 [2021-11-21 01:31:58,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:58,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:58,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:58,792 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-21 01:31:58,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 289 treesize of output 255 [2021-11-21 01:31:59,077 INFO L354 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2021-11-21 01:31:59,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 241 treesize of output 225 [2021-11-21 01:31:59,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:59,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:59,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:59,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:59,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:59,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:59,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:59,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 212 [2021-11-21 01:31:59,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:59,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:31:59,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:31:59,519 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 12 treesize of output 3 [2021-11-21 01:31:59,530 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 72 treesize of output 61 [2021-11-21 01:31:59,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:59,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:59,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:59,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:59,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:31:59,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:59,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 67 [2021-11-21 01:31:59,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:31:59,767 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 9 treesize of output 3 [2021-11-21 01:31:59,778 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 43 treesize of output 32 [2021-11-21 01:31:59,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:59,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:59,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:59,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:59,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 29 [2021-11-21 01:31:59,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:59,944 INFO L354 Elim1Store]: treesize reduction 52, result has 37.3 percent of original size [2021-11-21 01:31:59,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 145 [2021-11-21 01:32:00,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:32:00,074 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 47 treesize of output 41 [2021-11-21 01:32:00,101 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 91 treesize of output 78 [2021-11-21 01:32:00,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,118 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-21 01:32:00,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 62 [2021-11-21 01:32:00,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:00,376 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 12 treesize of output 3 [2021-11-21 01:32:00,401 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 72 treesize of output 61 [2021-11-21 01:32:00,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:00,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:00,613 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 12 treesize of output 3 [2021-11-21 01:32:00,640 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 72 treesize of output 61 [2021-11-21 01:32:00,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:00,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 141 [2021-11-21 01:32:00,832 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:00,861 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 93 treesize of output 80 [2021-11-21 01:32:00,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 64 [2021-11-21 01:32:00,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:00,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 34 [2021-11-21 01:32:01,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:01,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:01,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:01,069 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 12 treesize of output 3 [2021-11-21 01:32:01,081 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 72 treesize of output 61 [2021-11-21 01:32:01,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:01,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:01,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:01,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:01,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:02,903 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:32:03,610 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:32:03,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:32:03,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 7] total 22 [2021-11-21 01:32:03,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258221272] [2021-11-21 01:32:03,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:32:03,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-21 01:32:03,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:03,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-21 01:32:03,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-11-21 01:32:03,613 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:32:04,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:04,784 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-11-21 01:32:04,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:32:04,785 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 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 01:32:04,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:04,785 INFO L225 Difference]: With dead ends: 29 [2021-11-21 01:32:04,785 INFO L226 Difference]: Without dead ends: 27 [2021-11-21 01:32:04,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:32:04,787 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:04,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 31 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 86 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2021-11-21 01:32:04,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-21 01:32:04,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-11-21 01:32:04,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 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 01:32:04,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-21 01:32:04,794 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 15 [2021-11-21 01:32:04,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:04,794 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-21 01:32:04,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:32:04,794 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-21 01:32:04,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:32:04,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:04,795 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:04,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:05,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:05,003 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:05,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:05,004 INFO L85 PathProgramCache]: Analyzing trace with hash 741845092, now seen corresponding path program 2 times [2021-11-21 01:32:05,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:05,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044147941] [2021-11-21 01:32:05,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:05,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:32:05,165 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:05,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044147941] [2021-11-21 01:32:05,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044147941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:32:05,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658578745] [2021-11-21 01:32:05,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:32:05,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:05,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:05,166 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:05,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:32:05,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:32:05,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:32:05,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:32:05,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:05,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 77 [2021-11-21 01:32:05,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:05,323 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 47 treesize of output 36 [2021-11-21 01:32:05,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:05,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:05,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:05,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:05,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 29 [2021-11-21 01:32:05,336 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 9 treesize of output 3 [2021-11-21 01:32:05,455 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 41 treesize of output 29 [2021-11-21 01:32:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:32:05,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:32:05,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:32:05,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 104 [2021-11-21 01:32:05,593 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 13 treesize of output 4 [2021-11-21 01:32:05,622 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 13 treesize of output 4 [2021-11-21 01:32:05,638 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 96 treesize of output 84 [2021-11-21 01:32:05,657 INFO L354 Elim1Store]: treesize reduction 90, result has 10.0 percent of original size [2021-11-21 01:32:05,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 220 treesize of output 177 [2021-11-21 01:32:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:32:05,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658578745] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:32:05,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [973340934] [2021-11-21 01:32:05,794 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:32:05,794 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:32:05,794 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:32:05,795 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:32:05,795 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:32:05,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:05,882 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:32:05,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:32:05,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:05,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 01:32:06,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 133 [2021-11-21 01:32:06,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,207 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 94 treesize of output 84 [2021-11-21 01:32:06,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 68 treesize of output 62 [2021-11-21 01:32:06,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 24 [2021-11-21 01:32:06,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,405 INFO L354 Elim1Store]: treesize reduction 85, result has 15.0 percent of original size [2021-11-21 01:32:06,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 334 treesize of output 359 [2021-11-21 01:32:06,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,487 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-21 01:32:06,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 289 treesize of output 255 [2021-11-21 01:32:06,782 INFO L354 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2021-11-21 01:32:06,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 241 treesize of output 225 [2021-11-21 01:32:06,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:06,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 212 [2021-11-21 01:32:07,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:07,142 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:07,162 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 12 treesize of output 3 [2021-11-21 01:32:07,172 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 72 treesize of output 61 [2021-11-21 01:32:07,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:07,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:07,455 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:07,479 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 12 treesize of output 3 [2021-11-21 01:32:07,491 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 72 treesize of output 61 [2021-11-21 01:32:07,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:07,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 141 [2021-11-21 01:32:07,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 34 [2021-11-21 01:32:07,772 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 92 treesize of output 79 [2021-11-21 01:32:07,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2021-11-21 01:32:07,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:07,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:07,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:07,962 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 12 treesize of output 3 [2021-11-21 01:32:07,998 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 72 treesize of output 61 [2021-11-21 01:32:08,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:08,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:08,215 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 12 treesize of output 3 [2021-11-21 01:32:08,239 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 72 treesize of output 61 [2021-11-21 01:32:08,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:08,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 141 [2021-11-21 01:32:08,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 34 [2021-11-21 01:32:08,504 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 92 treesize of output 79 [2021-11-21 01:32:08,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2021-11-21 01:32:08,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:08,688 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 12 treesize of output 3 [2021-11-21 01:32:08,710 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 72 treesize of output 61 [2021-11-21 01:32:08,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:08,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:10,475 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:32:11,286 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:32:11,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:32:11,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2021-11-21 01:32:11,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890133970] [2021-11-21 01:32:11,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:32:11,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 01:32:11,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:11,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 01:32:11,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-11-21 01:32:11,288 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:32:11,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:11,729 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2021-11-21 01:32:11,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 01:32:11,737 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 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 01:32:11,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:11,738 INFO L225 Difference]: With dead ends: 30 [2021-11-21 01:32:11,738 INFO L226 Difference]: Without dead ends: 28 [2021-11-21 01:32:11,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 01:32:11,741 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:11,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:32:11,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-21 01:32:11,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2021-11-21 01:32:11,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 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 01:32:11,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-21 01:32:11,749 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2021-11-21 01:32:11,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:11,749 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-21 01:32:11,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:32:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-21 01:32:11,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:32:11,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:11,751 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:11,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:11,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:11,967 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:11,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:11,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1589243327, now seen corresponding path program 3 times [2021-11-21 01:32:11,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:11,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394466697] [2021-11-21 01:32:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:11,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:32:12,210 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:12,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394466697] [2021-11-21 01:32:12,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394466697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:32:12,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749052155] [2021-11-21 01:32:12,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:32:12,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:12,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:12,215 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:12,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:32:12,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:32:12,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:32:12,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:32:12,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:32:12,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:32:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:32:12,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749052155] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:32:12,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1024652122] [2021-11-21 01:32:12,742 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:32:12,743 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:32:12,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:32:12,743 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:32:12,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:32:12,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:12,817 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:32:12,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:32:12,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:12,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 01:32:13,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:13,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 105 [2021-11-21 01:32:13,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:13,177 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 71 treesize of output 61 [2021-11-21 01:32:13,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:13,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:13,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:13,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:13,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 51 treesize of output 51 [2021-11-21 01:32:13,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:13,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 24 [2021-11-21 01:32:13,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:13,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:13,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:13,402 INFO L354 Elim1Store]: treesize reduction 116, result has 26.1 percent of original size [2021-11-21 01:32:13,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 331 treesize of output 363 [2021-11-21 01:32:13,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:13,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:13,768 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-11-21 01:32:13,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 206 treesize of output 195 [2021-11-21 01:32:13,960 INFO L354 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2021-11-21 01:32:13,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 242 treesize of output 226 [2021-11-21 01:32:13,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:13,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:13,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:13,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:13,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:13,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:13,977 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-21 01:32:13,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 213 [2021-11-21 01:32:14,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:14,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:14,379 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 12 treesize of output 3 [2021-11-21 01:32:14,409 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 72 treesize of output 61 [2021-11-21 01:32:14,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:14,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:14,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:14,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:14,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:14,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:14,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:14,706 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:14,732 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 12 treesize of output 3 [2021-11-21 01:32:14,743 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 72 treesize of output 61 [2021-11-21 01:32:14,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:14,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:14,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:14,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:14,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:14,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:14,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:14,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 141 [2021-11-21 01:32:14,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:14,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-21 01:32:14,936 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 99 treesize of output 86 [2021-11-21 01:32:14,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:14,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:14,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:14,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:14,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:14,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:14,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:14,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 70 [2021-11-21 01:32:15,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:15,071 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 12 treesize of output 3 [2021-11-21 01:32:15,100 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 72 treesize of output 61 [2021-11-21 01:32:15,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:15,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 71 [2021-11-21 01:32:15,345 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 9 treesize of output 3 [2021-11-21 01:32:15,363 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 47 treesize of output 36 [2021-11-21 01:32:15,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 29 [2021-11-21 01:32:15,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,493 INFO L354 Elim1Store]: treesize reduction 52, result has 37.3 percent of original size [2021-11-21 01:32:15,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 145 [2021-11-21 01:32:15,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:32:15,598 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 34 treesize of output 34 [2021-11-21 01:32:15,625 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 89 treesize of output 76 [2021-11-21 01:32:15,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,643 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-21 01:32:15,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 60 [2021-11-21 01:32:15,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:15,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:15,933 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 12 treesize of output 3 [2021-11-21 01:32:15,947 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 72 treesize of output 61 [2021-11-21 01:32:15,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:15,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:17,576 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:32:18,326 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:32:18,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:32:18,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2021-11-21 01:32:18,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769895187] [2021-11-21 01:32:18,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:32:18,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-21 01:32:18,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:18,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-21 01:32:18,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2021-11-21 01:32:18,330 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:32:18,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:18,615 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-11-21 01:32:18,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:32:18,616 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 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 01:32:18,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:18,617 INFO L225 Difference]: With dead ends: 53 [2021-11-21 01:32:18,617 INFO L226 Difference]: Without dead ends: 23 [2021-11-21 01:32:18,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 01:32:18,619 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 47 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:18,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 45 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:32:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-21 01:32:18,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-21 01:32:18,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:32:18,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-21 01:32:18,624 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2021-11-21 01:32:18,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:18,625 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-21 01:32:18,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:32:18,625 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-21 01:32:18,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 01:32:18,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:18,626 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:18,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:18,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:18,827 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:18,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:18,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1112436306, now seen corresponding path program 4 times [2021-11-21 01:32:18,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:18,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945767837] [2021-11-21 01:32:18,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:18,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:32:18,943 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:18,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945767837] [2021-11-21 01:32:18,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945767837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:32:18,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163591109] [2021-11-21 01:32:18,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:32:18,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:18,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:18,944 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:18,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:32:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:18,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:32:18,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:32:19,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:32:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:32:19,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163591109] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:32:19,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [303843735] [2021-11-21 01:32:19,300 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:32:19,300 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:32:19,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:32:19,301 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:32:19,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:32:19,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:19,367 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-21 01:32:19,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-21 01:32:19,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:19,420 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:32:19,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:32:19,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:19,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 105 [2021-11-21 01:32:19,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:19,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-21 01:32:19,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:19,636 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 63 treesize of output 53 [2021-11-21 01:32:19,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:19,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:19,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:19,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:19,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 43 treesize of output 43 [2021-11-21 01:32:19,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:19,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:19,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:19,837 INFO L354 Elim1Store]: treesize reduction 116, result has 26.1 percent of original size [2021-11-21 01:32:19,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 331 treesize of output 363 [2021-11-21 01:32:20,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:20,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:20,157 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-11-21 01:32:20,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 206 treesize of output 187 [2021-11-21 01:32:20,355 INFO L354 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2021-11-21 01:32:20,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 236 treesize of output 220 [2021-11-21 01:32:20,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:20,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:20,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:20,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:20,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:20,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:20,380 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-21 01:32:20,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 207 [2021-11-21 01:32:20,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:20,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:20,718 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 12 treesize of output 3 [2021-11-21 01:32:20,736 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 72 treesize of output 61 [2021-11-21 01:32:20,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:20,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:20,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:20,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:20,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:21,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 67 [2021-11-21 01:32:21,057 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:21,083 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 9 treesize of output 3 [2021-11-21 01:32:21,101 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 43 treesize of output 32 [2021-11-21 01:32:21,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 29 [2021-11-21 01:32:21,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,213 INFO L354 Elim1Store]: treesize reduction 52, result has 37.3 percent of original size [2021-11-21 01:32:21,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 145 [2021-11-21 01:32:21,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:32:21,286 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 39 treesize of output 39 [2021-11-21 01:32:21,313 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 89 treesize of output 76 [2021-11-21 01:32:21,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,327 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-21 01:32:21,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 60 [2021-11-21 01:32:21,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:21,436 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:21,453 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 12 treesize of output 3 [2021-11-21 01:32:21,461 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 72 treesize of output 61 [2021-11-21 01:32:21,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:21,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:21,727 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 12 treesize of output 3 [2021-11-21 01:32:21,758 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 72 treesize of output 61 [2021-11-21 01:32:21,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:21,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 141 [2021-11-21 01:32:21,968 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 93 treesize of output 80 [2021-11-21 01:32:21,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:21,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 64 [2021-11-21 01:32:22,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:22,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 34 [2021-11-21 01:32:22,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:22,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:22,264 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:22,277 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 12 treesize of output 3 [2021-11-21 01:32:22,288 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 72 treesize of output 61 [2021-11-21 01:32:22,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:22,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:22,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:22,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:22,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:23,916 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:32:24,691 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:32:24,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:32:24,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-11-21 01:32:24,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90952586] [2021-11-21 01:32:24,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:32:24,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:32:24,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:24,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:32:24,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:32:24,695 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 01:32:24,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:24,808 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-11-21 01:32:24,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:32:24,809 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) Word has length 22 [2021-11-21 01:32:24,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:24,809 INFO L225 Difference]: With dead ends: 40 [2021-11-21 01:32:24,809 INFO L226 Difference]: Without dead ends: 25 [2021-11-21 01:32:24,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:32:24,811 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:24,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 14 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:32:24,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-21 01:32:24,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-21 01:32:24,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 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 01:32:24,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-21 01:32:24,823 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 22 [2021-11-21 01:32:24,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:24,823 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-21 01:32:24,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 01:32:24,824 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-21 01:32:24,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 01:32:24,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:24,826 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:24,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:25,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:25,040 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:25,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:25,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1570634082, now seen corresponding path program 5 times [2021-11-21 01:32:25,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:25,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217615201] [2021-11-21 01:32:25,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:25,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:32:25,804 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:25,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217615201] [2021-11-21 01:32:25,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217615201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:32:25,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914611650] [2021-11-21 01:32:25,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:32:25,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:25,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:25,807 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:25,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:32:25,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 01:32:25,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:32:25,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-21 01:32:25,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:25,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 78 [2021-11-21 01:32:26,013 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 9 treesize of output 3 [2021-11-21 01:32:26,027 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 51 treesize of output 40 [2021-11-21 01:32:26,058 INFO L354 Elim1Store]: treesize reduction 192, result has 13.1 percent of original size [2021-11-21 01:32:26,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 72 treesize of output 74 [2021-11-21 01:32:26,088 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-21 01:32:26,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 31 [2021-11-21 01:32:26,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,186 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-21 01:32:26,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 120 [2021-11-21 01:32:26,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-11-21 01:32:26,233 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 81 treesize of output 68 [2021-11-21 01:32:26,322 INFO L354 Elim1Store]: treesize reduction 495, result has 10.0 percent of original size [2021-11-21 01:32:26,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 118 treesize of output 121 [2021-11-21 01:32:26,349 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:26,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 40 [2021-11-21 01:32:26,461 INFO L354 Elim1Store]: treesize reduction 116, result has 24.2 percent of original size [2021-11-21 01:32:26,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 113 treesize of output 117 [2021-11-21 01:32:26,486 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 87 treesize of output 72 [2021-11-21 01:32:26,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 64 [2021-11-21 01:32:26,508 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-21 01:32:26,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 37 [2021-11-21 01:32:26,653 INFO L354 Elim1Store]: treesize reduction 192, result has 22.3 percent of original size [2021-11-21 01:32:26,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 106 treesize of output 134 [2021-11-21 01:32:26,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 31 [2021-11-21 01:32:26,692 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 80 treesize of output 61 [2021-11-21 01:32:26,800 INFO L354 Elim1Store]: treesize reduction 440, result has 11.5 percent of original size [2021-11-21 01:32:26,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 87 treesize of output 103 [2021-11-21 01:32:26,824 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:26,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:26,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 43 [2021-11-21 01:32:26,992 INFO L354 Elim1Store]: treesize reduction 322, result has 19.7 percent of original size [2021-11-21 01:32:26,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 146 treesize of output 192 [2021-11-21 01:32:27,064 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 126 treesize of output 107 [2021-11-21 01:32:27,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,135 INFO L354 Elim1Store]: treesize reduction 156, result has 15.2 percent of original size [2021-11-21 01:32:27,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 92 treesize of output 106 [2021-11-21 01:32:27,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:27,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:32:27,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 64 [2021-11-21 01:32:27,586 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-21 01:32:27,587 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 111 treesize of output 69 [2021-11-21 01:32:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:32:27,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:32:28,591 WARN L838 $PredicateComparison]: unable to prove that (and (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| |c_ULTIMATE.start_main_~CCCELVOL1~0#1|) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (let ((.cse0 (select (let ((.cse3 (* |ULTIMATE.start_main_~i~0#1| 12))) (let ((.cse1 (let ((.cse4 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) .cse3) 0)) (.cse5 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse3 (- 8)))) (store .cse4 .cse5 (select .cse4 .cse5)))) (.cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 12) .cse3))) (store .cse1 .cse2 (select .cse1 .cse2)))) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)))) (or (= .cse0 0) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse0))))) (or (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (let ((.cse6 (select (let ((.cse9 (* |ULTIMATE.start_main_~i~0#1| 12))) (let ((.cse7 (let ((.cse10 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) .cse9) |c_ULTIMATE.start_main_~CCCELVOL1~0#1|)) (.cse11 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse9 (- 8)))) (store .cse10 .cse11 (select .cse10 .cse11)))) (.cse8 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 12) .cse9))) (store .cse7 .cse8 (select .cse7 .cse8)))) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)))) (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse6) (= .cse6 0)))) (< |c_ULTIMATE.start_main_~CCCELVOL1~0#1| |c_ULTIMATE.start_main_~MINVAL~0#1|))) is different from false [2021-11-21 01:32:29,436 WARN L838 $PredicateComparison]: unable to prove that (and (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| |c_ULTIMATE.start_main_~CCCELVOL1~0#1|) (forall ((v_subst_2 Int)) (let ((.cse0 (select (let ((.cse3 (* v_subst_2 12))) (let ((.cse1 (let ((.cse4 (store (let ((.cse8 (* |c_ULTIMATE.start_main_~i~0#1| 12))) (let ((.cse6 (let ((.cse9 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) .cse8) 0)) (.cse10 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse8 (- 8)))) (store .cse9 .cse10 (select .cse9 .cse10)))) (.cse7 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 12) .cse8))) (store .cse6 .cse7 (select .cse6 .cse7)))) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) .cse3) 0)) (.cse5 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse3 (- 8)))) (store .cse4 .cse5 (select .cse4 .cse5)))) (.cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 12) .cse3))) (store .cse1 .cse2 (select .cse1 .cse2)))) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)))) (or (= .cse0 0) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse0))))) (or (forall ((v_subst_1 Int)) (let ((.cse11 (select (let ((.cse14 (* v_subst_1 12))) (let ((.cse12 (let ((.cse15 (store (let ((.cse19 (* |c_ULTIMATE.start_main_~i~0#1| 12))) (let ((.cse17 (let ((.cse20 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) .cse19) |c_ULTIMATE.start_main_~CCCELVOL1~0#1|)) (.cse21 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse19 (- 8)))) (store .cse20 .cse21 (select .cse20 .cse21)))) (.cse18 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 12) .cse19))) (store .cse17 .cse18 (select .cse17 .cse18)))) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) .cse14) |c_ULTIMATE.start_main_~CCCELVOL1~0#1|)) (.cse16 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse14 (- 8)))) (store .cse15 .cse16 (select .cse15 .cse16)))) (.cse13 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 12) .cse14))) (store .cse12 .cse13 (select .cse12 .cse13)))) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)))) (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse11) (= .cse11 0)))) (< |c_ULTIMATE.start_main_~CCCELVOL1~0#1| |c_ULTIMATE.start_main_~MINVAL~0#1|))) is different from false [2021-11-21 01:32:29,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:32:29,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 164 treesize of output 164 [2021-11-21 01:32:29,687 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 13 treesize of output 4 [2021-11-21 01:32:29,719 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 13 treesize of output 4 [2021-11-21 01:32:29,734 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 156 treesize of output 136 [2021-11-21 01:32:29,746 INFO L354 Elim1Store]: treesize reduction 95, result has 5.0 percent of original size [2021-11-21 01:32:29,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 408 treesize of output 321 [2021-11-21 01:32:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2021-11-21 01:32:29,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914611650] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:32:29,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1068918255] [2021-11-21 01:32:29,842 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:32:29,842 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:32:29,843 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:32:29,843 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:32:29,843 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:32:29,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:29,904 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:32:29,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:32:29,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:29,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 01:32:30,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:30,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 105 [2021-11-21 01:32:30,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:30,180 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 71 treesize of output 61 [2021-11-21 01:32:30,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:30,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:30,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:30,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:30,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 51 treesize of output 51 [2021-11-21 01:32:30,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:30,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 24 [2021-11-21 01:32:30,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:30,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:30,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:30,387 INFO L354 Elim1Store]: treesize reduction 116, result has 26.1 percent of original size [2021-11-21 01:32:30,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 331 treesize of output 363 [2021-11-21 01:32:30,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:30,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:30,762 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-11-21 01:32:30,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 212 treesize of output 193 [2021-11-21 01:32:30,958 INFO L354 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2021-11-21 01:32:30,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 222 [2021-11-21 01:32:30,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:30,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:30,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:30,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:30,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:30,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:30,993 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-21 01:32:30,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 209 [2021-11-21 01:32:31,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:31,247 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 12 treesize of output 3 [2021-11-21 01:32:31,275 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 72 treesize of output 61 [2021-11-21 01:32:31,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:31,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:31,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:31,593 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 12 treesize of output 3 [2021-11-21 01:32:31,603 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 72 treesize of output 61 [2021-11-21 01:32:31,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 141 [2021-11-21 01:32:31,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-21 01:32:31,811 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 99 treesize of output 86 [2021-11-21 01:32:31,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 70 [2021-11-21 01:32:31,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:31,927 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 12 treesize of output 3 [2021-11-21 01:32:31,951 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 72 treesize of output 61 [2021-11-21 01:32:31,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:32,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 71 [2021-11-21 01:32:32,204 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 9 treesize of output 3 [2021-11-21 01:32:32,223 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 47 treesize of output 36 [2021-11-21 01:32:32,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 29 [2021-11-21 01:32:32,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,313 INFO L354 Elim1Store]: treesize reduction 52, result has 37.3 percent of original size [2021-11-21 01:32:32,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 145 [2021-11-21 01:32:32,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:32:32,400 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 47 treesize of output 47 [2021-11-21 01:32:32,427 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 91 treesize of output 78 [2021-11-21 01:32:32,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,448 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-21 01:32:32,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 62 [2021-11-21 01:32:32,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:32,666 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:32,678 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 12 treesize of output 3 [2021-11-21 01:32:32,687 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 72 treesize of output 61 [2021-11-21 01:32:32,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:34,280 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:32:34,893 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:32:34,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:32:34,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 12] total 41 [2021-11-21 01:32:34,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311566315] [2021-11-21 01:32:34,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:32:34,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-21 01:32:34,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:34,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-21 01:32:34,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1868, Unknown=2, NotChecked=178, Total=2256 [2021-11-21 01:32:34,895 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 41 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 41 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:32:42,931 WARN L227 SmtUtils]: Spent 7.33s on a formula simplification. DAG size of input: 92 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:32:49,943 WARN L227 SmtUtils]: Spent 6.88s on a formula simplification. DAG size of input: 93 DAG size of output: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:32:50,512 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse12 (* |c_ULTIMATE.start_main_~i~0#1| 12)) (.cse9 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* 12 |c_ULTIMATE.start_main_~i~0#1|)))) (let ((.cse0 (<= .cse9 24)) (.cse10 (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|)) (.cse11 (= |c_ULTIMATE.start_main_~CCCELVOL1~0#1| 1)) (.cse13 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 12) .cse12)) (.cse20 (< |c_ULTIMATE.start_main_~CCCELVOL1~0#1| |c_ULTIMATE.start_main_~MINVAL~0#1|)) (.cse2 (select .cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)))) (and (or .cse0 (<= (div c_~CELLCOUNT~0 3) 2)) (= (select .cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 8)) 0) (<= 3 .cse2) (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| |c_ULTIMATE.start_main_~CCCELVOL1~0#1|) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (let ((.cse3 (select (let ((.cse6 (* |ULTIMATE.start_main_~i~0#1| 12))) (let ((.cse4 (let ((.cse7 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) .cse6) 0)) (.cse8 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse6 (- 8)))) (store .cse7 .cse8 (select .cse7 .cse8)))) (.cse5 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 12) .cse6))) (store .cse4 .cse5 (select .cse4 .cse5)))) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)))) (or (= .cse3 0) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse3))))) (<= |c_ULTIMATE.start_main_~i~0#1| 3) (<= 2 c_~CELLCOUNT~0) (= 2 |c_ULTIMATE.start_main_~i~0#1|) (<= 7 |c_ULTIMATE.start_main_~CCCELVOL3~0#1|) .cse0 (or (not (= .cse9 24)) (and .cse10 .cse11 (<= |c_ULTIMATE.start_main_~MINVAL~0#1| |c_ULTIMATE.start_main_~CCCELVOL2~0#1|) (<= 7 (select (store .cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse12 (- 8)) |c_ULTIMATE.start_main_~CCCELVOL2~0#1|) .cse13)))) .cse10 (<= 7 (select .cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12))) .cse11 (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (= |c_ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |c_ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 7 (select .cse1 12)) (< 23 .cse9) (or (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (let ((.cse14 (select (let ((.cse17 (* |ULTIMATE.start_main_~i~0#1| 12))) (let ((.cse15 (let ((.cse18 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) .cse17) |c_ULTIMATE.start_main_~CCCELVOL1~0#1|)) (.cse19 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse17 (- 8)))) (store .cse18 .cse19 (select .cse18 .cse19)))) (.cse16 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 12) .cse17))) (store .cse15 .cse16 (select .cse15 .cse16)))) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)))) (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse14) (= .cse14 0)))) .cse20) (<= 7 (select (store .cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) .cse12) 0) .cse13)) .cse20 (= .cse2 (select .cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 16)))))) is different from false [2021-11-21 01:32:51,208 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse11 (* |c_ULTIMATE.start_main_~i~0#1| 12)) (.cse7 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* 12 |c_ULTIMATE.start_main_~i~0#1|)))) (let ((.cse0 (<= .cse7 24)) (.cse8 (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|)) (.cse9 (= |c_ULTIMATE.start_main_~CCCELVOL1~0#1| 1)) (.cse10 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse12 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 12) .cse11)) (.cse20 (< |c_ULTIMATE.start_main_~CCCELVOL1~0#1| |c_ULTIMATE.start_main_~MINVAL~0#1|))) (and (or .cse0 (<= (div c_~CELLCOUNT~0 3) 2)) (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| |c_ULTIMATE.start_main_~CCCELVOL1~0#1|) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (let ((.cse1 (select (let ((.cse4 (* |ULTIMATE.start_main_~i~0#1| 12))) (let ((.cse2 (let ((.cse5 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) .cse4) 0)) (.cse6 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse4 (- 8)))) (store .cse5 .cse6 (select .cse5 .cse6)))) (.cse3 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 12) .cse4))) (store .cse2 .cse3 (select .cse2 .cse3)))) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)))) (or (= .cse1 0) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse1))))) (<= |c_ULTIMATE.start_main_~i~0#1| 3) (<= 2 c_~CELLCOUNT~0) (<= 7 |c_ULTIMATE.start_main_~CCCELVOL3~0#1|) .cse0 (or (not (= .cse7 24)) (and .cse8 .cse9 (<= |c_ULTIMATE.start_main_~MINVAL~0#1| |c_ULTIMATE.start_main_~CCCELVOL2~0#1|) (<= 7 (select (store .cse10 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse11 (- 8)) |c_ULTIMATE.start_main_~CCCELVOL2~0#1|) .cse12)))) .cse8 .cse9 (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (let ((.cse13 (select .cse10 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4))))) (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse13) (= .cse13 0))) (= |c_ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 7 (select .cse10 12)) (< 23 .cse7) (or (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (let ((.cse14 (select (let ((.cse17 (* |ULTIMATE.start_main_~i~0#1| 12))) (let ((.cse15 (let ((.cse18 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) .cse17) |c_ULTIMATE.start_main_~CCCELVOL1~0#1|)) (.cse19 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse17 (- 8)))) (store .cse18 .cse19 (select .cse18 .cse19)))) (.cse16 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 12) .cse17))) (store .cse15 .cse16 (select .cse15 .cse16)))) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)))) (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse14) (= .cse14 0)))) .cse20) (<= 7 (select (store .cse10 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) .cse11) 0) .cse12)) .cse20))) is different from false [2021-11-21 01:32:52,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:52,033 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2021-11-21 01:32:52,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-21 01:32:52,034 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 41 states have internal predecessors, (66), 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 24 [2021-11-21 01:32:52,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:52,035 INFO L225 Difference]: With dead ends: 67 [2021-11-21 01:32:52,035 INFO L226 Difference]: Without dead ends: 65 [2021-11-21 01:32:52,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1833 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=602, Invalid=4960, Unknown=4, NotChecked=596, Total=6162 [2021-11-21 01:32:52,038 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 54 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:52,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 97 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 587 Invalid, 0 Unknown, 92 Unchecked, 0.6s Time] [2021-11-21 01:32:52,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-21 01:32:52,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2021-11-21 01:32:52,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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 01:32:52,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-11-21 01:32:52,058 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2021-11-21 01:32:52,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:52,058 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-11-21 01:32:52,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 41 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:32:52,059 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-11-21 01:32:52,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 01:32:52,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:52,060 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:52,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:52,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-21 01:32:52,287 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:52,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:52,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1937821435, now seen corresponding path program 6 times [2021-11-21 01:32:52,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:52,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860066146] [2021-11-21 01:32:52,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:52,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 01:32:52,545 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:52,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860066146] [2021-11-21 01:32:52,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860066146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:32:52,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273496970] [2021-11-21 01:32:52,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:32:52,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:52,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:52,554 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:52,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:32:52,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:32:52,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:32:52,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:32:52,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 01:32:52,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:32:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 01:32:53,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273496970] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:32:53,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [312254285] [2021-11-21 01:32:53,024 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:32:53,024 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:32:53,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:32:53,025 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:32:53,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:32:53,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,096 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-21 01:32:53,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-21 01:32:53,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,139 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:32:53,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:32:53,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 133 [2021-11-21 01:32:53,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 14 [2021-11-21 01:32:53,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,449 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 86 treesize of output 76 [2021-11-21 01:32:53,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2021-11-21 01:32:53,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,577 INFO L354 Elim1Store]: treesize reduction 85, result has 15.0 percent of original size [2021-11-21 01:32:53,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 334 treesize of output 359 [2021-11-21 01:32:53,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,659 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-21 01:32:53,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 289 treesize of output 255 [2021-11-21 01:32:53,864 INFO L354 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2021-11-21 01:32:53,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 241 treesize of output 225 [2021-11-21 01:32:53,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:53,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 212 [2021-11-21 01:32:54,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:54,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:54,184 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 12 treesize of output 3 [2021-11-21 01:32:54,204 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 0 case distinctions, treesize of input 72 treesize of output 61 [2021-11-21 01:32:54,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:54,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:54,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:54,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:54,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:54,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:54,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:54,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:54,462 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 12 treesize of output 3 [2021-11-21 01:32:54,475 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 72 treesize of output 61 [2021-11-21 01:32:54,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:54,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:54,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:54,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:54,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:54,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:54,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:54,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 141 [2021-11-21 01:32:54,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:54,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 34 [2021-11-21 01:32:54,739 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 92 treesize of output 79 [2021-11-21 01:32:54,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:54,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:54,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:54,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:54,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:54,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:54,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:54,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2021-11-21 01:32:54,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:54,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:54,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:54,998 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 12 treesize of output 3 [2021-11-21 01:32:55,006 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 72 treesize of output 61 [2021-11-21 01:32:55,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:55,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:55,202 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:55,218 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 12 treesize of output 3 [2021-11-21 01:32:55,227 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 72 treesize of output 61 [2021-11-21 01:32:55,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:55,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 141 [2021-11-21 01:32:55,371 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 93 treesize of output 80 [2021-11-21 01:32:55,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 64 [2021-11-21 01:32:55,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 34 [2021-11-21 01:32:55,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:32:55,557 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 12 treesize of output 3 [2021-11-21 01:32:55,582 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 72 treesize of output 61 [2021-11-21 01:32:55,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:55,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:32:57,253 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:32:57,765 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:32:57,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:32:57,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2021-11-21 01:32:57,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477634446] [2021-11-21 01:32:57,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:32:57,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-21 01:32:57,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:57,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-21 01:32:57,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-11-21 01:32:57,767 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 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 01:32:58,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:58,050 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2021-11-21 01:32:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:32:58,052 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 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 28 [2021-11-21 01:32:58,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:58,053 INFO L225 Difference]: With dead ends: 96 [2021-11-21 01:32:58,053 INFO L226 Difference]: Without dead ends: 69 [2021-11-21 01:32:58,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=259, Invalid=1001, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 01:32:58,055 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 98 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:58,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 21 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:32:58,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-21 01:32:58,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 43. [2021-11-21 01:32:58,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 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 01:32:58,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-11-21 01:32:58,069 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 28 [2021-11-21 01:32:58,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:58,069 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-11-21 01:32:58,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 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 01:32:58,070 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-11-21 01:32:58,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 01:32:58,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:58,071 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:58,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-21 01:32:58,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-21 01:32:58,291 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:58,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:58,292 INFO L85 PathProgramCache]: Analyzing trace with hash -835925506, now seen corresponding path program 7 times [2021-11-21 01:32:58,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:58,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435598727] [2021-11-21 01:32:58,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:58,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:32:58,689 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:58,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435598727] [2021-11-21 01:32:58,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435598727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:32:58,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973808591] [2021-11-21 01:32:58,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:32:58,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:58,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:58,691 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:58,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:32:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:58,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 01:32:58,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:58,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 78 [2021-11-21 01:32:58,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:58,879 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 9 treesize of output 3 [2021-11-21 01:32:58,882 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 51 treesize of output 40 [2021-11-21 01:32:58,921 INFO L354 Elim1Store]: treesize reduction 192, result has 13.1 percent of original size [2021-11-21 01:32:58,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 72 treesize of output 74 [2021-11-21 01:32:58,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:58,947 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-21 01:32:58,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 31 [2021-11-21 01:32:59,215 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 81 treesize of output 63 [2021-11-21 01:32:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:32:59,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:32:59,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:32:59,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 104 [2021-11-21 01:32:59,471 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 13 treesize of output 4 [2021-11-21 01:32:59,491 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 13 treesize of output 4 [2021-11-21 01:32:59,503 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 96 treesize of output 84 [2021-11-21 01:32:59,516 INFO L354 Elim1Store]: treesize reduction 90, result has 10.0 percent of original size [2021-11-21 01:32:59,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 433 treesize of output 351 [2021-11-21 01:32:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:32:59,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973808591] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:32:59,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [964042516] [2021-11-21 01:32:59,705 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:32:59,705 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:32:59,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:32:59,706 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:32:59,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:32:59,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:59,767 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:32:59,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:32:59,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:59,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 01:32:59,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:59,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 133 [2021-11-21 01:32:59,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:59,978 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 90 treesize of output 80 [2021-11-21 01:32:59,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:59,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:59,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:59,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:59,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 64 treesize of output 58 [2021-11-21 01:33:00,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:00,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 17 [2021-11-21 01:33:00,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:00,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:00,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:00,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:00,179 INFO L354 Elim1Store]: treesize reduction 85, result has 15.0 percent of original size [2021-11-21 01:33:00,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 334 treesize of output 359 [2021-11-21 01:33:00,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:00,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:00,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:00,242 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-21 01:33:00,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 289 treesize of output 247 [2021-11-21 01:33:00,506 INFO L354 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2021-11-21 01:33:00,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 241 treesize of output 225 [2021-11-21 01:33:00,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:00,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:00,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:00,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:00,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:00,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:00,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:00,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 212 [2021-11-21 01:33:00,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:00,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:33:00,769 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 12 treesize of output 3 [2021-11-21 01:33:00,791 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 72 treesize of output 61 [2021-11-21 01:33:00,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:00,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:00,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:00,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:00,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:33:01,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:33:01,033 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:01,049 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 12 treesize of output 3 [2021-11-21 01:33:01,057 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 72 treesize of output 61 [2021-11-21 01:33:01,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:33:01,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 141 [2021-11-21 01:33:01,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-21 01:33:01,224 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 99 treesize of output 86 [2021-11-21 01:33:01,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 70 [2021-11-21 01:33:01,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:33:01,407 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 12 treesize of output 3 [2021-11-21 01:33:01,428 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 72 treesize of output 61 [2021-11-21 01:33:01,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:33:01,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 71 [2021-11-21 01:33:01,670 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:01,686 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 9 treesize of output 3 [2021-11-21 01:33:01,694 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 47 treesize of output 36 [2021-11-21 01:33:01,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 29 [2021-11-21 01:33:01,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,822 INFO L354 Elim1Store]: treesize reduction 52, result has 37.3 percent of original size [2021-11-21 01:33:01,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 145 [2021-11-21 01:33:01,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:33:01,905 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 47 treesize of output 41 [2021-11-21 01:33:01,929 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 91 treesize of output 78 [2021-11-21 01:33:01,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:01,946 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-21 01:33:01,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 62 [2021-11-21 01:33:02,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:02,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:33:02,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:02,146 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 12 treesize of output 3 [2021-11-21 01:33:02,157 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 72 treesize of output 61 [2021-11-21 01:33:02,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:02,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:02,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:02,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:02,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:33:03,727 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:04,304 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:04,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:33:04,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 39 [2021-11-21 01:33:04,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691298239] [2021-11-21 01:33:04,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:04,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-21 01:33:04,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:04,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-21 01:33:04,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1868, Unknown=0, NotChecked=0, Total=2070 [2021-11-21 01:33:04,307 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:05,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:05,384 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2021-11-21 01:33:05,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-21 01:33:05,385 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 states have internal predecessors, (81), 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 30 [2021-11-21 01:33:05,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:05,386 INFO L225 Difference]: With dead ends: 72 [2021-11-21 01:33:05,386 INFO L226 Difference]: Without dead ends: 70 [2021-11-21 01:33:05,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=525, Invalid=3897, Unknown=0, NotChecked=0, Total=4422 [2021-11-21 01:33:05,389 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 49 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:05,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 114 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:33:05,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-21 01:33:05,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2021-11-21 01:33:05,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:05,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-11-21 01:33:05,404 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 30 [2021-11-21 01:33:05,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:05,404 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-11-21 01:33:05,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:05,405 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-11-21 01:33:05,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 01:33:05,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:05,406 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:05,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-21 01:33:05,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:05,614 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:05,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:05,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1605373108, now seen corresponding path program 8 times [2021-11-21 01:33:05,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:05,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705097241] [2021-11-21 01:33:05,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:05,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 01:33:05,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:05,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705097241] [2021-11-21 01:33:05,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705097241] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:05,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001433370] [2021-11-21 01:33:05,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:33:05,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:05,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:05,792 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:05,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:33:05,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:33:05,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:05,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:33:05,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:33:06,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:33:06,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001433370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:06,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [645265054] [2021-11-21 01:33:06,473 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:33:06,473 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:06,473 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:06,473 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:06,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:06,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:06,549 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-21 01:33:06,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-21 01:33:06,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:06,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:06,600 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:33:06,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:33:06,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:06,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 133 [2021-11-21 01:33:06,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:06,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 18 [2021-11-21 01:33:06,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:06,787 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 86 treesize of output 76 [2021-11-21 01:33:06,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:06,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:06,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:06,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:06,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 60 treesize of output 54 [2021-11-21 01:33:06,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:06,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:06,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:06,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:07,006 INFO L354 Elim1Store]: treesize reduction 85, result has 15.0 percent of original size [2021-11-21 01:33:07,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 334 treesize of output 359 [2021-11-21 01:33:07,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:07,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:07,068 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 0 case distinctions, treesize of input 56 treesize of output 30 [2021-11-21 01:33:07,089 INFO L354 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2021-11-21 01:33:07,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 305 treesize of output 289 [2021-11-21 01:33:07,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:07,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:07,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:07,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:07,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:07,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:07,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:07,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 276 [2021-11-21 01:33:07,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:07,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:33:07,628 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 12 treesize of output 3 [2021-11-21 01:33:07,645 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 72 treesize of output 61 [2021-11-21 01:33:07,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:07,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:07,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:07,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:07,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:33:07,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:07,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 67 [2021-11-21 01:33:07,809 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:07,819 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 9 treesize of output 3 [2021-11-21 01:33:07,829 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 0 case distinctions, treesize of input 43 treesize of output 32 [2021-11-21 01:33:07,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:07,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:07,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:07,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:07,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 29 [2021-11-21 01:33:08,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,030 INFO L354 Elim1Store]: treesize reduction 52, result has 37.3 percent of original size [2021-11-21 01:33:08,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 145 [2021-11-21 01:33:08,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:33:08,132 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 39 treesize of output 39 [2021-11-21 01:33:08,162 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 89 treesize of output 76 [2021-11-21 01:33:08,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,178 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-21 01:33:08,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 60 [2021-11-21 01:33:08,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:33:08,293 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:08,308 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 12 treesize of output 3 [2021-11-21 01:33:08,315 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 72 treesize of output 61 [2021-11-21 01:33:08,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:33:08,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:33:08,508 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 12 treesize of output 3 [2021-11-21 01:33:08,529 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 72 treesize of output 61 [2021-11-21 01:33:08,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:33:08,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 141 [2021-11-21 01:33:08,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-21 01:33:08,767 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 99 treesize of output 86 [2021-11-21 01:33:08,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 70 [2021-11-21 01:33:08,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 99 [2021-11-21 01:33:08,925 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:08,943 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 12 treesize of output 3 [2021-11-21 01:33:08,952 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 72 treesize of output 61 [2021-11-21 01:33:08,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 01:33:10,487 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:10,976 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:10,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:33:10,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2021-11-21 01:33:10,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702845487] [2021-11-21 01:33:10,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:10,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-21 01:33:10,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:10,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-21 01:33:10,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-11-21 01:33:10,978 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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 01:33:11,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:11,508 INFO L93 Difference]: Finished difference Result 119 states and 136 transitions. [2021-11-21 01:33:11,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-21 01:33:11,509 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) Word has length 30 [2021-11-21 01:33:11,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:11,509 INFO L225 Difference]: With dead ends: 119 [2021-11-21 01:33:11,509 INFO L226 Difference]: Without dead ends: 76 [2021-11-21 01:33:11,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=363, Invalid=1799, Unknown=0, NotChecked=0, Total=2162 [2021-11-21 01:33:11,511 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 47 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:11,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 51 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:33:11,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-21 01:33:11,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2021-11-21 01:33:11,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:11,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-11-21 01:33:11,529 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 30 [2021-11-21 01:33:11,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:11,530 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-11-21 01:33:11,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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 01:33:11,530 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-11-21 01:33:11,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 01:33:11,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:11,532 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:11,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:11,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:11,735 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:11,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:11,735 INFO L85 PathProgramCache]: Analyzing trace with hash 77369892, now seen corresponding path program 9 times [2021-11-21 01:33:11,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:11,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487529588] [2021-11-21 01:33:11,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:11,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:12,200 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:12,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487529588] [2021-11-21 01:33:12,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487529588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:12,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563289924] [2021-11-21 01:33:12,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:33:12,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:12,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:12,202 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:12,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c4a1c68-bc4c-4f3f-8ae4-713e01f54f8e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:33:12,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:33:12,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:12,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-21 01:33:12,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:12,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 75 [2021-11-21 01:33:12,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:12,389 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 9 treesize of output 3 [2021-11-21 01:33:12,393 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 0 case distinctions, treesize of input 51 treesize of output 40 [2021-11-21 01:33:12,424 INFO L354 Elim1Store]: treesize reduction 192, result has 13.1 percent of original size [2021-11-21 01:33:12,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 72 treesize of output 74 [2021-11-21 01:33:12,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-11-21 01:33:12,508 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-21 01:33:12,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 131 treesize of output 123 [2021-11-21 01:33:12,530 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 93 treesize of output 80 [2021-11-21 01:33:12,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 64 [2021-11-21 01:33:12,552 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-21 01:33:12,552 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 55 treesize of output 28 [2021-11-21 01:33:12,669 INFO L354 Elim1Store]: treesize reduction 137, result has 23.9 percent of original size [2021-11-21 01:33:12,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 106 treesize of output 122 [2021-11-21 01:33:12,691 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 86 treesize of output 71 [2021-11-21 01:33:12,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 74 [2021-11-21 01:33:12,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 31 [2021-11-21 01:33:12,835 INFO L354 Elim1Store]: treesize reduction 252, result has 19.5 percent of original size [2021-11-21 01:33:12,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 148 treesize of output 179 [2021-11-21 01:33:12,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:12,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 37 [2021-11-21 01:33:12,889 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 111 treesize of output 92 [2021-11-21 01:33:13,026 INFO L354 Elim1Store]: treesize reduction 954, result has 8.5 percent of original size [2021-11-21 01:33:13,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 27 case distinctions, treesize of input 142 treesize of output 161 [2021-11-21 01:33:13,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,093 INFO L354 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2021-11-21 01:33:13,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 73 [2021-11-21 01:33:13,241 INFO L354 Elim1Store]: treesize reduction 382, result has 18.2 percent of original size [2021-11-21 01:33:13,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 166 treesize of output 209 [2021-11-21 01:33:13,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 43 [2021-11-21 01:33:13,307 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 123 treesize of output 102 [2021-11-21 01:33:13,498 INFO L354 Elim1Store]: treesize reduction 1236, result has 8.1 percent of original size [2021-11-21 01:33:13,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 35 case distinctions, treesize of input 152 treesize of output 184 [2021-11-21 01:33:13,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,578 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-21 01:33:13,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 88 [2021-11-21 01:33:14,592 INFO L354 Elim1Store]: treesize reduction 156, result has 0.6 percent of original size [2021-11-21 01:33:14,592 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 140 treesize of output 83 [2021-11-21 01:33:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:33:14,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:15,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:33:15,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 641 treesize of output 641 [2021-11-21 01:33:15,285 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 13 treesize of output 4 [2021-11-21 01:33:15,327 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 13 treesize of output 4 [2021-11-21 01:33:15,355 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 628 treesize of output 560 [2021-11-21 01:33:15,445 INFO L354 Elim1Store]: treesize reduction 251, result has 2.0 percent of original size [2021-11-21 01:33:15,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 90389622 treesize of output 79185717