./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/add-3-n-u.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_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/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_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/add-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/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_960a3db8-9f43-4d5b-8202-c49a20327ac8/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 efbd812580893a7521723358e51d4f43c4b930b57b026212f5a7d5f447f3e0f8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:30:25,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:30:25,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:30:25,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:30:25,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:30:25,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:30:25,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:30:25,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:30:25,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:30:25,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:30:25,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:30:25,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:30:25,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:30:25,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:30:25,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:30:25,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:30:25,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:30:25,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:30:25,345 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:30:25,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:30:25,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:30:25,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:30:25,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:30:25,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:30:25,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:30:25,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:30:25,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:30:25,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:30:25,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:30:25,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:30:25,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:30:25,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:30:25,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:30:25,379 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:30:25,380 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:30:25,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:30:25,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:30:25,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:30:25,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:30:25,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:30:25,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:30:25,384 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:30:25,430 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:30:25,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:30:25,431 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:30:25,431 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:30:25,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:30:25,435 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:30:25,435 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:30:25,436 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:30:25,436 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:30:25,436 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:30:25,436 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:30:25,438 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:30:25,438 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:30:25,439 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:30:25,439 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:30:25,439 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:30:25,439 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:30:25,439 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:30:25,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:30:25,440 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:30:25,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:30:25,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:30:25,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:30:25,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:30:25,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:30:25,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:30:25,442 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:30:25,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:30:25,442 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:30:25,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:30:25,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:30:25,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:30:25,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:30:25,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:30:25,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:30:25,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:30:25,444 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:30:25,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:30:25,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:30:25,444 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:30:25,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:30:25,444 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_960a3db8-9f43-4d5b-8202-c49a20327ac8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efbd812580893a7521723358e51d4f43c4b930b57b026212f5a7d5f447f3e0f8 [2021-11-21 01:30:25,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:30:25,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:30:25,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:30:25,756 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:30:25,757 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:30:25,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-multidimensional/add-3-n-u.c [2021-11-21 01:30:25,837 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/data/0d0d60263/0a73065e48294e9c95acc8d0e43aa969/FLAGe1da73b18 [2021-11-21 01:30:26,288 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:30:26,288 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/sv-benchmarks/c/array-multidimensional/add-3-n-u.c [2021-11-21 01:30:26,298 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/data/0d0d60263/0a73065e48294e9c95acc8d0e43aa969/FLAGe1da73b18 [2021-11-21 01:30:26,667 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/data/0d0d60263/0a73065e48294e9c95acc8d0e43aa969 [2021-11-21 01:30:26,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:30:26,672 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:30:26,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:30:26,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:30:26,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:30:26,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:30:26" (1/1) ... [2021-11-21 01:30:26,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ce35f42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:30:26, skipping insertion in model container [2021-11-21 01:30:26,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:30:26" (1/1) ... [2021-11-21 01:30:26,693 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:30:26,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:30:26,829 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_960a3db8-9f43-4d5b-8202-c49a20327ac8/sv-benchmarks/c/array-multidimensional/add-3-n-u.c[321,334] [2021-11-21 01:30:26,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:30:26,918 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:30:26,930 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_960a3db8-9f43-4d5b-8202-c49a20327ac8/sv-benchmarks/c/array-multidimensional/add-3-n-u.c[321,334] [2021-11-21 01:30:26,963 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:30:26,983 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:30:26,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:30:26 WrapperNode [2021-11-21 01:30:26,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:30:26,986 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:30:26,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:30:26,987 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:30:26,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:30:26" (1/1) ... [2021-11-21 01:30:27,013 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:30:26" (1/1) ... [2021-11-21 01:30:27,045 INFO L137 Inliner]: procedures = 14, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 118 [2021-11-21 01:30:27,046 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:30:27,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:30:27,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:30:27,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:30:27,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:30:26" (1/1) ... [2021-11-21 01:30:27,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:30:26" (1/1) ... [2021-11-21 01:30:27,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:30:26" (1/1) ... [2021-11-21 01:30:27,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:30:26" (1/1) ... [2021-11-21 01:30:27,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:30:26" (1/1) ... [2021-11-21 01:30:27,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:30:26" (1/1) ... [2021-11-21 01:30:27,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:30:26" (1/1) ... [2021-11-21 01:30:27,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:30:27,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:30:27,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:30:27,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:30:27,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:30:26" (1/1) ... [2021-11-21 01:30:27,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:30:27,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:30:27,146 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:30:27,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:30:27,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:30:27,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:30:27,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:30:27,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:30:27,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:30:27,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:30:27,197 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:30:27,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:30:27,270 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:30:27,271 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:30:27,429 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:30:27,482 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:30:27,482 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-21 01:30:27,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:30:27 BoogieIcfgContainer [2021-11-21 01:30:27,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:30:27,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:30:27,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:30:27,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:30:27,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:30:26" (1/3) ... [2021-11-21 01:30:27,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1497e8eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:30:27, skipping insertion in model container [2021-11-21 01:30:27,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:30:26" (2/3) ... [2021-11-21 01:30:27,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1497e8eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:30:27, skipping insertion in model container [2021-11-21 01:30:27,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:30:27" (3/3) ... [2021-11-21 01:30:27,529 INFO L111 eAbstractionObserver]: Analyzing ICFG add-3-n-u.c [2021-11-21 01:30:27,535 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:30:27,535 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:30:27,596 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:30:27,603 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 01:30:27,604 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:30:27,638 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:27,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:30:27,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:30:27,646 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:30:27,646 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:30:27,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:30:27,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1242475547, now seen corresponding path program 1 times [2021-11-21 01:30:27,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:30:27,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532516751] [2021-11-21 01:30:27,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:27,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:30:27,745 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:30:27,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225107017] [2021-11-21 01:30:27,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:27,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:30:27,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:30:27,750 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:30:27,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:30:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:30:27,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:30:27,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:30:27,951 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 01:30:27,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:30:27,951 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:30:27,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532516751] [2021-11-21 01:30:27,952 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:30:27,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225107017] [2021-11-21 01:30:27,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225107017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:30:27,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:30:27,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:30:27,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124248539] [2021-11-21 01:30:27,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:30:27,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:30:27,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:30:27,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:30:27,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:30:27,989 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:28,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:30:28,046 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2021-11-21 01:30:28,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:30:28,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 01:30:28,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:30:28,056 INFO L225 Difference]: With dead ends: 29 [2021-11-21 01:30:28,057 INFO L226 Difference]: Without dead ends: 17 [2021-11-21 01:30:28,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:30:28,064 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:30:28,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:30:28,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-21 01:30:28,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-11-21 01:30:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 23 transitions. [2021-11-21 01:30:28,097 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 23 transitions. Word has length 8 [2021-11-21 01:30:28,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:30:28,097 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 23 transitions. [2021-11-21 01:30:28,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:28,098 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 23 transitions. [2021-11-21 01:30:28,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:30:28,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:30:28,099 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:30:28,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:30:28,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 01:30:28,319 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:30:28,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:30:28,320 INFO L85 PathProgramCache]: Analyzing trace with hash 103004432, now seen corresponding path program 1 times [2021-11-21 01:30:28,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:30:28,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260647293] [2021-11-21 01:30:28,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:28,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:30:28,329 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:30:28,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677836096] [2021-11-21 01:30:28,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:28,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:30:28,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:30:28,342 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:30:28,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:30:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:30:28,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:30:28,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:30:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:30:28,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:30:28,438 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:30:28,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260647293] [2021-11-21 01:30:28,438 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:30:28,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677836096] [2021-11-21 01:30:28,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677836096] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:30:28,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:30:28,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:30:28,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462149646] [2021-11-21 01:30:28,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:30:28,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:30:28,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:30:28,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:30:28,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:30:28,442 INFO L87 Difference]: Start difference. First operand 15 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 01:30:28,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:30:28,506 INFO L93 Difference]: Finished difference Result 40 states and 63 transitions. [2021-11-21 01:30:28,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:30:28,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 01:30:28,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:30:28,508 INFO L225 Difference]: With dead ends: 40 [2021-11-21 01:30:28,508 INFO L226 Difference]: Without dead ends: 27 [2021-11-21 01:30:28,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 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 01:30:28,510 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:30:28,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 11 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:30:28,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-21 01:30:28,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2021-11-21 01:30:28,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 01:30:28,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2021-11-21 01:30:28,518 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 10 [2021-11-21 01:30:28,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:30:28,518 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2021-11-21 01:30:28,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 01:30:28,519 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2021-11-21 01:30:28,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 01:30:28,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:30:28,520 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:30:28,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:30:28,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:30:28,735 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:30:28,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:30:28,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1848574842, now seen corresponding path program 1 times [2021-11-21 01:30:28,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:30:28,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15611802] [2021-11-21 01:30:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:28,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:30:28,744 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:30:28,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166853431] [2021-11-21 01:30:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:28,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:30:28,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:30:28,753 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:30:28,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:30:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:30:28,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:30:28,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:30:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:30:28,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:30:28,875 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:30:28,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15611802] [2021-11-21 01:30:28,876 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:30:28,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166853431] [2021-11-21 01:30:28,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166853431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:30:28,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:30:28,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:30:28,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483819602] [2021-11-21 01:30:28,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:30:28,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:30:28,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:30:28,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:30:28,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:30:28,880 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:28,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:30:28,995 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2021-11-21 01:30:28,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:30:28,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-21 01:30:28,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:30:28,998 INFO L225 Difference]: With dead ends: 43 [2021-11-21 01:30:28,998 INFO L226 Difference]: Without dead ends: 27 [2021-11-21 01:30:28,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 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 01:30:29,003 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:30:29,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 12 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:30:29,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-21 01:30:29,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2021-11-21 01:30:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:29,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2021-11-21 01:30:29,025 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 12 [2021-11-21 01:30:29,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:30:29,025 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2021-11-21 01:30:29,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:29,026 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2021-11-21 01:30:29,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:30:29,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:30:29,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:30:29,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:30:29,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:30:29,246 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:30:29,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:30:29,247 INFO L85 PathProgramCache]: Analyzing trace with hash 2114319717, now seen corresponding path program 1 times [2021-11-21 01:30:29,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:30:29,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739356273] [2021-11-21 01:30:29,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:29,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:30:29,255 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:30:29,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109176809] [2021-11-21 01:30:29,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:29,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:30:29,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:30:29,260 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:30:29,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:30:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:30:29,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:30:29,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:30:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:30:29,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:30:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:30:29,426 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:30:29,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739356273] [2021-11-21 01:30:29,426 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:30:29,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109176809] [2021-11-21 01:30:29,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109176809] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:30:29,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2118365647] [2021-11-21 01:30:29,446 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:30:29,446 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:30:29,451 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:30:29,457 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:30:29,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:30:29,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:29,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:29,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:29,701 INFO L354 Elim1Store]: treesize reduction 178, result has 22.3 percent of original size [2021-11-21 01:30:29,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 76 [2021-11-21 01:30:29,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:29,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:29,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:29,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:29,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:30,009 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-21 01:30:30,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-21 01:30:30,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:30,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:30,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 61 [2021-11-21 01:30:31,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:31,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:31,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:31,369 INFO L354 Elim1Store]: treesize reduction 172, result has 15.7 percent of original size [2021-11-21 01:30:31,370 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 2 case distinctions, treesize of input 388 treesize of output 356 [2021-11-21 01:30:31,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:31,926 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:31,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:32,888 INFO L354 Elim1Store]: treesize reduction 323, result has 10.8 percent of original size [2021-11-21 01:30:32,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 181 [2021-11-21 01:30:33,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:33,252 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:33,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:33,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:33,818 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:30:33,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:30:34,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:34,029 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:34,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:34,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:34,137 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:34,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:34,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:34,572 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:30:34,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:30:34,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:34,709 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:34,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:34,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:34,897 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:34,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:35,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:35,734 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:30:35,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:30:35,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:35,923 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:35,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:36,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:36,023 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:36,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:36,095 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:30:36,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2118365647] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:30:36,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:30:36,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 11 [2021-11-21 01:30:36,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624075653] [2021-11-21 01:30:36,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:30:36,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:30:36,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:30:36,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:30:36,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:30:36,593 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:37,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:30:37,075 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2021-11-21 01:30:37,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:30:37,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 01:30:37,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:30:37,076 INFO L225 Difference]: With dead ends: 42 [2021-11-21 01:30:37,076 INFO L226 Difference]: Without dead ends: 33 [2021-11-21 01:30:37,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:30:37,078 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:30:37,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 9 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:30:37,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-21 01:30:37,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2021-11-21 01:30:37,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:37,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2021-11-21 01:30:37,089 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2021-11-21 01:30:37,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:30:37,089 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2021-11-21 01:30:37,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:37,089 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2021-11-21 01:30:37,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:30:37,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:30:37,090 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:30:37,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:30:37,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:30:37,315 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:30:37,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:30:37,315 INFO L85 PathProgramCache]: Analyzing trace with hash -475134270, now seen corresponding path program 1 times [2021-11-21 01:30:37,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:30:37,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092589887] [2021-11-21 01:30:37,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:37,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:30:37,319 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:30:37,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204359898] [2021-11-21 01:30:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:37,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:30:37,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:30:37,321 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:30:37,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:30:37,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:30:37,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:30:37,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:30:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:30:37,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:30:37,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:30:37,446 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:30:37,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092589887] [2021-11-21 01:30:37,446 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:30:37,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204359898] [2021-11-21 01:30:37,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204359898] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:30:37,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [558768136] [2021-11-21 01:30:37,449 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 01:30:37,450 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:30:37,450 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:30:37,450 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:30:37,450 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:30:37,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:37,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:37,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:37,575 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-21 01:30:37,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-21 01:30:37,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:37,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:37,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:37,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 16 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2021-11-21 01:30:38,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:38,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:38,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 69 [2021-11-21 01:30:38,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:38,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:38,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:38,592 INFO L354 Elim1Store]: treesize reduction 172, result has 15.7 percent of original size [2021-11-21 01:30:38,593 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 2 case distinctions, treesize of input 388 treesize of output 356 [2021-11-21 01:30:39,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:39,101 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:39,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:39,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:39,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:39,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:39,724 INFO L354 Elim1Store]: treesize reduction 144, result has 18.2 percent of original size [2021-11-21 01:30:39,724 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 2 case distinctions, treesize of input 197 treesize of output 181 [2021-11-21 01:30:40,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:40,050 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:40,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:40,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:40,311 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:40,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:40,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:40,486 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:40,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:40,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:40,612 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:40,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:42,290 INFO L354 Elim1Store]: treesize reduction 383, result has 10.1 percent of original size [2021-11-21 01:30:42,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 209 treesize of output 189 [2021-11-21 01:30:42,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:42,581 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:42,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:42,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:42,824 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:42,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:42,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:42,967 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:42,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:43,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:43,169 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:43,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:43,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:43,529 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:30:43,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:30:43,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:43,653 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:43,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:43,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:43,734 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:43,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:44,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:44,030 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:30:44,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:30:44,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:44,186 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:44,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:44,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:44,490 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:44,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:44,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:44,597 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:44,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:44,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:44,737 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:44,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:45,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:45,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:45,193 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:30:45,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:30:45,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:45,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:45,560 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:30:45,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:30:46,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:46,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:46,274 INFO L354 Elim1Store]: treesize reduction 54, result has 51.4 percent of original size [2021-11-21 01:30:46,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 79 [2021-11-21 01:30:46,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:46,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:46,568 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:30:46,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:30:47,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:47,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:47,342 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:30:47,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:30:47,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:47,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:47,600 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:30:47,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:30:48,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:48,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:48,084 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:30:48,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:30:48,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:48,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:48,503 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:30:48,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:30:50,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:50,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:50,683 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:30:50,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:30:51,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:51,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:51,173 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:30:51,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:30:51,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:51,571 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:30:51,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:30:51,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:51,667 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:51,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:51,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:51,838 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:51,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:52,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:52,129 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:52,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:52,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:52,317 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:52,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:52,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:52,586 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:52,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:52,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:52,672 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:52,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:52,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:52,815 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:52,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:53,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:53,127 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:30:53,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:30:53,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:53,311 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:53,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:53,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:53,389 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:53,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:53,472 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:30:54,216 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:30:54,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:30:54,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-21 01:30:54,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272619517] [2021-11-21 01:30:54,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:30:54,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:30:54,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:30:54,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:30:54,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:30:54,218 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:54,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:30:54,329 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2021-11-21 01:30:54,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:30:54,330 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-21 01:30:54,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:30:54,330 INFO L225 Difference]: With dead ends: 64 [2021-11-21 01:30:54,331 INFO L226 Difference]: Without dead ends: 44 [2021-11-21 01:30:54,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:30:54,332 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 41 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:30:54,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 18 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:30:54,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-21 01:30:54,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-11-21 01:30:54,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:54,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-11-21 01:30:54,347 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 18 [2021-11-21 01:30:54,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:30:54,348 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-11-21 01:30:54,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:30:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-11-21 01:30:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 01:30:54,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:30:54,349 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:30:54,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:30:54,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:30:54,555 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:30:54,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:30:54,555 INFO L85 PathProgramCache]: Analyzing trace with hash 795485591, now seen corresponding path program 2 times [2021-11-21 01:30:54,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:30:54,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216719579] [2021-11-21 01:30:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:54,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:30:54,559 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:30:54,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [884092965] [2021-11-21 01:30:54,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:30:54,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:30:54,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:30:54,582 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:30:54,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:30:54,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:30:54,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:30:54,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:30:54,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:30:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-21 01:30:54,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:30:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-21 01:30:54,781 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:30:54,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216719579] [2021-11-21 01:30:54,781 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:30:54,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884092965] [2021-11-21 01:30:54,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884092965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:30:54,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1407491874] [2021-11-21 01:30:54,784 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 01:30:54,784 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:30:54,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:30:54,785 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:30:54,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:30:54,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:54,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:54,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:54,913 INFO L354 Elim1Store]: treesize reduction 178, result has 22.3 percent of original size [2021-11-21 01:30:54,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 76 [2021-11-21 01:30:55,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:55,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:55,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:55,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:55,225 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-21 01:30:55,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-21 01:30:56,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:56,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:56,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 61 [2021-11-21 01:30:56,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:56,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:56,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:56,357 INFO L354 Elim1Store]: treesize reduction 172, result has 15.7 percent of original size [2021-11-21 01:30:56,357 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 2 case distinctions, treesize of input 388 treesize of output 356 [2021-11-21 01:30:56,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:57,011 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:57,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:58,036 INFO L354 Elim1Store]: treesize reduction 323, result has 10.8 percent of original size [2021-11-21 01:30:58,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 181 [2021-11-21 01:30:58,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:58,378 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:58,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:58,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:58,651 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:58,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:58,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:58,737 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:58,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:30:58,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:58,888 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:30:58,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:31:00,698 INFO L354 Elim1Store]: treesize reduction 383, result has 10.1 percent of original size [2021-11-21 01:31:00,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 209 treesize of output 189 [2021-11-21 01:31:01,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:01,075 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:31:01,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:31:01,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:01,415 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:31:01,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:31:01,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:01,505 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:31:01,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:31:01,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:01,618 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:31:01,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:31:01,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:01,915 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:31:01,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:31:02,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:02,076 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:31:02,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:31:02,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:02,235 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:31:02,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:31:02,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:02,495 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:31:02,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:31:02,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:02,601 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:31:02,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:31:02,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:02,810 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:31:02,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:31:02,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:02,963 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:31:02,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:31:03,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:03,080 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:31:03,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:31:03,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:03,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:03,586 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:31:03,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:31:03,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:03,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:03,937 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:31:03,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:31:04,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:04,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:04,638 INFO L354 Elim1Store]: treesize reduction 54, result has 51.4 percent of original size [2021-11-21 01:31:04,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 79 [2021-11-21 01:31:04,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:04,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:04,903 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:31:04,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:31:05,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:05,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:05,426 INFO L354 Elim1Store]: treesize reduction 54, result has 51.4 percent of original size [2021-11-21 01:31:05,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 79 [2021-11-21 01:31:05,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:05,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:05,806 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:31:05,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:31:06,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:06,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:06,399 INFO L354 Elim1Store]: treesize reduction 54, result has 51.4 percent of original size [2021-11-21 01:31:06,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 79 [2021-11-21 01:31:06,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:06,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:06,727 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:31:06,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:31:08,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:08,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:08,455 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:31:08,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:31:08,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:08,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:08,738 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:31:08,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:31:09,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:09,193 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:31:09,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:31:09,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:09,344 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:31:09,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:31:09,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:09,422 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:31:09,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:31:09,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:09,800 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:31:09,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:31:09,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:09,926 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:31:09,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:31:10,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:10,156 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:31:10,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:31:10,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:10,267 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:31:10,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:31:10,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:10,369 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:31:10,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:31:10,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:10,581 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:31:10,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:31:10,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:10,741 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:31:10,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:31:10,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:10,935 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:31:10,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:31:10,953 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:31:11,654 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:31:11,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:31:11,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-21 01:31:11,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226453532] [2021-11-21 01:31:11,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:31:11,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:31:11,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:31:11,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:31:11,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:31:11,656 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 01:31:11,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:31:11,834 INFO L93 Difference]: Finished difference Result 167 states and 219 transitions. [2021-11-21 01:31:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:31:11,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 24 [2021-11-21 01:31:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:31:11,836 INFO L225 Difference]: With dead ends: 167 [2021-11-21 01:31:11,836 INFO L226 Difference]: Without dead ends: 140 [2021-11-21 01:31:11,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:31:11,838 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 198 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:31:11,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 28 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:31:11,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-21 01:31:11,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 85. [2021-11-21 01:31:11,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2857142857142858) internal successors, (108), 84 states have internal predecessors, (108), 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 01:31:11,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2021-11-21 01:31:11,884 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 24 [2021-11-21 01:31:11,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:31:11,884 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2021-11-21 01:31:11,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 01:31:11,885 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2021-11-21 01:31:11,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 01:31:11,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:31:11,890 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:31:11,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:31:12,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:31:12,107 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:31:12,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:31:12,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2031543819, now seen corresponding path program 3 times [2021-11-21 01:31:12,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:31:12,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913229139] [2021-11-21 01:31:12,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:12,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:31:12,116 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:31:12,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709626431] [2021-11-21 01:31:12,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:31:12,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:31:12,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:31:12,118 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:31:12,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:41:57,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:41:57,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:41:57,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:41:57,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 151 proven. 1 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2021-11-21 01:41:58,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 122 proven. 30 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2021-11-21 01:41:58,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:41:58,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913229139] [2021-11-21 01:41:58,204 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:41:58,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709626431] [2021-11-21 01:41:58,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709626431] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:58,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [685801941] [2021-11-21 01:41:58,208 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 01:41:58,208 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:41:58,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:41:58,209 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:41:58,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:41:58,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:58,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:58,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:58,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:58,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:58,340 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-21 01:41:58,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-21 01:41:58,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:58,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:58,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:58,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 15 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2021-11-21 01:41:59,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:59,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:59,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 69 [2021-11-21 01:41:59,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:59,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:59,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:59,461 INFO L354 Elim1Store]: treesize reduction 172, result has 15.7 percent of original size [2021-11-21 01:41:59,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 388 treesize of output 356 [2021-11-21 01:41:59,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:59,991 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:41:59,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:00,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:00,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:00,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:00,910 INFO L354 Elim1Store]: treesize reduction 144, result has 18.2 percent of original size [2021-11-21 01:42:00,911 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 2 case distinctions, treesize of input 197 treesize of output 181 [2021-11-21 01:42:01,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:01,259 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:01,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:01,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:01,343 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:01,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:01,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:01,621 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:42:01,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:42:01,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:01,700 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:01,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:01,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:01,853 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:01,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:03,653 INFO L354 Elim1Store]: treesize reduction 383, result has 10.1 percent of original size [2021-11-21 01:42:03,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 209 treesize of output 189 [2021-11-21 01:42:03,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:04,008 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:04,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:04,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:04,248 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:42:04,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:42:04,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:04,345 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:04,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:04,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:04,493 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:04,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:04,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:04,836 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:04,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:04,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:04,966 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:04,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:05,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:05,031 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:05,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:05,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:05,402 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:42:05,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:42:05,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:05,467 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:05,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:05,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:05,785 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:05,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:05,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:05,869 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:05,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:05,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:06,014 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:06,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:06,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:06,363 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:42:06,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:42:06,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:06,433 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:06,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:06,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:06,541 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:06,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:06,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:06,918 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:42:06,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:42:07,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:07,033 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:07,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:07,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:07,241 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:42:07,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:42:07,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:07,376 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:07,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:07,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:07,466 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:07,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:07,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:07,758 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:42:07,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:42:07,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:07,888 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:07,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:08,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:08,022 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:08,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:08,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:08,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:08,324 INFO L354 Elim1Store]: treesize reduction 54, result has 51.4 percent of original size [2021-11-21 01:42:08,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 79 [2021-11-21 01:42:08,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:08,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:08,569 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:42:08,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:42:09,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:09,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:09,173 INFO L354 Elim1Store]: treesize reduction 54, result has 51.4 percent of original size [2021-11-21 01:42:09,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 79 [2021-11-21 01:42:09,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:09,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:09,491 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:42:09,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:42:10,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:10,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:10,105 INFO L354 Elim1Store]: treesize reduction 54, result has 51.4 percent of original size [2021-11-21 01:42:10,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 79 [2021-11-21 01:42:10,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:10,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:10,342 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:42:10,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:42:10,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:10,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:10,896 INFO L354 Elim1Store]: treesize reduction 54, result has 51.4 percent of original size [2021-11-21 01:42:10,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 79 [2021-11-21 01:42:11,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:11,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:11,272 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:42:11,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:42:12,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:12,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:12,854 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:42:12,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:42:13,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:13,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:13,210 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:42:13,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:42:13,559 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:42:14,294 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:42:14,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:42:14,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-21 01:42:14,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518419553] [2021-11-21 01:42:14,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:42:14,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:42:14,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:14,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:42:14,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:42:14,296 INFO L87 Difference]: Start difference. First operand 85 states and 108 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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 01:42:14,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:14,456 INFO L93 Difference]: Finished difference Result 354 states and 461 transitions. [2021-11-21 01:42:14,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:42:14,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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 72 [2021-11-21 01:42:14,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:14,459 INFO L225 Difference]: With dead ends: 354 [2021-11-21 01:42:14,459 INFO L226 Difference]: Without dead ends: 278 [2021-11-21 01:42:14,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:42:14,461 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 76 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:14,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 19 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:42:14,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-21 01:42:14,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 271. [2021-11-21 01:42:14,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.2333333333333334) internal successors, (333), 270 states have internal predecessors, (333), 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 01:42:14,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 333 transitions. [2021-11-21 01:42:14,528 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 333 transitions. Word has length 72 [2021-11-21 01:42:14,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:14,529 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 333 transitions. [2021-11-21 01:42:14,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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 01:42:14,529 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 333 transitions. [2021-11-21 01:42:14,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-21 01:42:14,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:14,534 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 16, 16, 16, 16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:42:14,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-21 01:42:14,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:14,747 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:14,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:14,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1546414407, now seen corresponding path program 4 times [2021-11-21 01:42:14,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:14,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93924067] [2021-11-21 01:42:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:14,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:14,766 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:42:14,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783676630] [2021-11-21 01:42:14,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:42:14,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:14,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:14,775 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:14,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:42:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:14,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:42:14,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6720 backedges. 398 proven. 10 refuted. 0 times theorem prover too weak. 6312 trivial. 0 not checked. [2021-11-21 01:42:15,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:42:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6720 backedges. 398 proven. 10 refuted. 0 times theorem prover too weak. 6312 trivial. 0 not checked. [2021-11-21 01:42:15,689 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:15,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93924067] [2021-11-21 01:42:15,689 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:42:15,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783676630] [2021-11-21 01:42:15,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783676630] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:42:15,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [783899492] [2021-11-21 01:42:15,691 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 01:42:15,692 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:42:15,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:42:15,692 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:42:15,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:42:15,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:15,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:15,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:15,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:15,810 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-21 01:42:15,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-21 01:42:15,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:15,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:15,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:15,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 16 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2021-11-21 01:42:16,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:16,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:16,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 61 [2021-11-21 01:42:17,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:17,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:17,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:17,198 INFO L354 Elim1Store]: treesize reduction 172, result has 15.7 percent of original size [2021-11-21 01:42:17,199 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 2 case distinctions, treesize of input 388 treesize of output 356 [2021-11-21 01:42:17,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:17,886 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:17,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:18,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:18,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:18,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:18,864 INFO L354 Elim1Store]: treesize reduction 168, result has 17.6 percent of original size [2021-11-21 01:42:18,864 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 2 case distinctions, treesize of input 209 treesize of output 189 [2021-11-21 01:42:19,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:19,218 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:19,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:19,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:19,284 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:19,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:19,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:19,513 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:42:19,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:42:19,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:19,659 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:19,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:19,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:19,803 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:19,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:21,729 INFO L354 Elim1Store]: treesize reduction 323, result has 10.8 percent of original size [2021-11-21 01:42:21,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 181 [2021-11-21 01:42:22,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:22,109 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:22,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:22,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:22,446 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:22,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:22,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:22,569 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:22,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:22,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:22,730 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:22,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:23,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:23,062 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:23,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:23,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:23,227 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:23,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:23,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:23,351 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:23,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:23,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:23,621 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:42:23,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:42:23,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:23,724 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:23,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:23,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:23,962 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:23,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:24,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:24,072 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:24,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:24,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:24,171 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:24,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:24,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:24,583 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:42:24,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:42:24,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:24,762 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:24,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:24,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:24,829 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:24,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:25,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:25,079 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:42:25,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:42:25,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:25,222 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:25,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:25,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:25,502 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:25,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:25,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:25,569 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:25,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:25,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:25,754 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:25,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:26,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:26,085 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-21 01:42:26,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-21 01:42:26,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:26,190 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:26,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:26,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:26,294 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-21 01:42:26,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-21 01:42:26,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:26,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:26,587 INFO L354 Elim1Store]: treesize reduction 54, result has 51.4 percent of original size [2021-11-21 01:42:26,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 79 [2021-11-21 01:42:26,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:26,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:26,891 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:42:26,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:42:27,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:27,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:27,393 INFO L354 Elim1Store]: treesize reduction 54, result has 51.4 percent of original size [2021-11-21 01:42:27,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 79 [2021-11-21 01:42:27,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:27,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:27,646 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:42:27,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:42:28,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:28,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:28,216 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:42:28,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:42:28,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:28,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:28,509 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:42:28,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:42:29,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:29,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:29,252 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:42:29,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:42:29,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:29,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:29,590 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:42:29,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:42:31,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:31,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:31,350 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:42:31,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:42:31,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:31,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:31,932 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-21 01:42:31,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-21 01:42:32,130 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:42:32,877 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:42:32,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:42:32,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-21 01:42:32,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512404309] [2021-11-21 01:42:32,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:42:32,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 01:42:32,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:32,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 01:42:32,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2021-11-21 01:42:32,879 INFO L87 Difference]: Start difference. First operand 271 states and 333 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:42:33,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:33,247 INFO L93 Difference]: Finished difference Result 817 states and 1171 transitions. [2021-11-21 01:42:33,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 01:42:33,247 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2021-11-21 01:42:33,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:33,251 INFO L225 Difference]: With dead ends: 817 [2021-11-21 01:42:33,251 INFO L226 Difference]: Without dead ends: 554 [2021-11-21 01:42:33,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 626 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=252, Invalid=450, Unknown=0, NotChecked=0, Total=702 [2021-11-21 01:42:33,257 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 141 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:33,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 36 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:42:33,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-21 01:42:33,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 535. [2021-11-21 01:42:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 1.1629213483146068) internal successors, (621), 534 states have internal predecessors, (621), 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 01:42:33,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 621 transitions. [2021-11-21 01:42:33,375 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 621 transitions. Word has length 216 [2021-11-21 01:42:33,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:33,375 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 621 transitions. [2021-11-21 01:42:33,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:42:33,376 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 621 transitions. [2021-11-21 01:42:33,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-11-21 01:42:33,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:33,386 INFO L514 BasicCegarLoop]: trace histogram [160, 160, 16, 16, 16, 16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:42:33,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:42:33,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-21 01:42:33,599 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:33,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:33,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1138692935, now seen corresponding path program 5 times [2021-11-21 01:42:33,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:33,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910436042] [2021-11-21 01:42:33,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:33,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:33,626 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:42:33,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890597385] [2021-11-21 01:42:33,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:42:33,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:33,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:33,628 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:33,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960a3db8-9f43-4d5b-8202-c49a20327ac8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process