./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/mbpr4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/mbpr4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0 --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 d3770c63a87ff983494c9353997301d9eb30588c650f83b67bcf55f325443055 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 19:34:54,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:34:54,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:34:54,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:34:54,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:34:54,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:34:54,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:34:54,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:34:54,470 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:34:54,471 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:34:54,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:34:54,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:34:54,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:34:54,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:34:54,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:34:54,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:34:54,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:34:54,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:34:54,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:34:54,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:34:54,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:34:54,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:34:54,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:34:54,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:34:54,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:34:54,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:34:54,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:34:54,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:34:54,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:34:54,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:34:54,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:34:54,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:34:54,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:34:54,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:34:54,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:34:54,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:34:54,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:34:54,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:34:54,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:34:54,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:34:54,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:34:54,512 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 19:34:54,539 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:34:54,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:34:54,540 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:34:54,540 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:34:54,541 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:34:54,541 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:34:54,541 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:34:54,541 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:34:54,541 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:34:54,542 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:34:54,542 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:34:54,542 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:34:54,546 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:34:54,547 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:34:54,547 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:34:54,547 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:34:54,547 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:34:54,548 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:34:54,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:34:54,549 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:34:54,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:34:54,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:34:54,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:34:54,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:34:54,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:34:54,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:34:54,550 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:34:54,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:34:54,551 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:34:54,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:34:54,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:34:54,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:34:54,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:34:54,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:34:54,552 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:34:54,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:34:54,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:34:54,553 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:34:54,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:34:54,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:34:54,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:34:54,554 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d3770c63a87ff983494c9353997301d9eb30588c650f83b67bcf55f325443055 [2022-11-16 19:34:54,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:34:54,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:34:54,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:34:54,924 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:34:54,924 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:34:54,926 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-tiling/mbpr4.c [2022-11-16 19:34:55,006 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/data/f9c7ab070/fc2592dd0ff541e982d4da828a62d611/FLAGd5e043f06 [2022-11-16 19:34:55,573 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:34:55,575 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/sv-benchmarks/c/array-tiling/mbpr4.c [2022-11-16 19:34:55,585 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/data/f9c7ab070/fc2592dd0ff541e982d4da828a62d611/FLAGd5e043f06 [2022-11-16 19:34:55,890 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/data/f9c7ab070/fc2592dd0ff541e982d4da828a62d611 [2022-11-16 19:34:55,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:34:55,898 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:34:55,903 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:34:55,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:34:55,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:34:55,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:34:55" (1/1) ... [2022-11-16 19:34:55,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c495de2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:55, skipping insertion in model container [2022-11-16 19:34:55,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:34:55" (1/1) ... [2022-11-16 19:34:55,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:34:55,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:34:56,160 WARN L229 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_2b0788a0-5e06-4b6c-baef-caa5bac10417/sv-benchmarks/c/array-tiling/mbpr4.c[396,409] [2022-11-16 19:34:56,193 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:34:56,201 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:34:56,214 WARN L229 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_2b0788a0-5e06-4b6c-baef-caa5bac10417/sv-benchmarks/c/array-tiling/mbpr4.c[396,409] [2022-11-16 19:34:56,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:34:56,248 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:34:56,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56 WrapperNode [2022-11-16 19:34:56,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:34:56,250 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:34:56,251 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:34:56,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:34:56,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2022-11-16 19:34:56,271 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2022-11-16 19:34:56,299 INFO L138 Inliner]: procedures = 15, calls = 54, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 145 [2022-11-16 19:34:56,299 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:34:56,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:34:56,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:34:56,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:34:56,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2022-11-16 19:34:56,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2022-11-16 19:34:56,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2022-11-16 19:34:56,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2022-11-16 19:34:56,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2022-11-16 19:34:56,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2022-11-16 19:34:56,349 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2022-11-16 19:34:56,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2022-11-16 19:34:56,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:34:56,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:34:56,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:34:56,355 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:34:56,356 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2022-11-16 19:34:56,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:34:56,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:56,389 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:34:56,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:34:56,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:34:56,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:34:56,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 19:34:56,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 19:34:56,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:34:56,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:34:56,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 19:34:56,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 19:34:56,556 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:34:56,559 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:34:56,852 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:34:57,002 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:34:57,008 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-16 19:34:57,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:34:57 BoogieIcfgContainer [2022-11-16 19:34:57,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:34:57,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:34:57,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:34:57,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:34:57,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:34:55" (1/3) ... [2022-11-16 19:34:57,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff7d070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:34:57, skipping insertion in model container [2022-11-16 19:34:57,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (2/3) ... [2022-11-16 19:34:57,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff7d070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:34:57, skipping insertion in model container [2022-11-16 19:34:57,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:34:57" (3/3) ... [2022-11-16 19:34:57,024 INFO L112 eAbstractionObserver]: Analyzing ICFG mbpr4.c [2022-11-16 19:34:57,044 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:34:57,044 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 19:34:57,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:34:57,109 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@371ef383, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:34:57,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 19:34:57,114 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:57,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:34:57,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:57,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:34:57,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:34:57,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:57,128 INFO L85 PathProgramCache]: Analyzing trace with hash -421576162, now seen corresponding path program 1 times [2022-11-16 19:34:57,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:34:57,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991620864] [2022-11-16 19:34:57,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:57,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:34:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:57,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:34:57,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991620864] [2022-11-16 19:34:57,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991620864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:34:57,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:34:57,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:34:57,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807045953] [2022-11-16 19:34:57,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:34:57,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:34:57,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:34:57,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:34:57,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:34:57,840 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-16 19:34:57,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:57,962 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2022-11-16 19:34:57,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:34:57,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 [2022-11-16 19:34:57,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:57,979 INFO L225 Difference]: With dead ends: 30 [2022-11-16 19:34:57,980 INFO L226 Difference]: Without dead ends: 13 [2022-11-16 19:34:57,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:34:57,986 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:57,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 12 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:34:58,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-16 19:34:58,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-16 19:34:58,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:58,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2022-11-16 19:34:58,026 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 10 [2022-11-16 19:34:58,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:58,026 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2022-11-16 19:34:58,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-16 19:34:58,028 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2022-11-16 19:34:58,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:34:58,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:58,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:34:58,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:34:58,029 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:34:58,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:58,030 INFO L85 PathProgramCache]: Analyzing trace with hash -392121662, now seen corresponding path program 1 times [2022-11-16 19:34:58,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:34:58,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379278153] [2022-11-16 19:34:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:58,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:34:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:34:58,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:34:58,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379278153] [2022-11-16 19:34:58,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379278153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:34:58,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:34:58,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:34:58,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747063739] [2022-11-16 19:34:58,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:34:58,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:34:58,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:34:58,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:34:58,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:34:58,372 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:58,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:58,424 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2022-11-16 19:34:58,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:34:58,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:34:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:58,427 INFO L225 Difference]: With dead ends: 23 [2022-11-16 19:34:58,427 INFO L226 Difference]: Without dead ends: 16 [2022-11-16 19:34:58,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:34:58,434 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 28 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:58,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 7 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:34:58,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-16 19:34:58,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-16 19:34:58,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:58,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-16 19:34:58,451 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 11 [2022-11-16 19:34:58,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:58,454 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-16 19:34:58,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:58,456 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-16 19:34:58,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 19:34:58,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:58,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:34:58,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 19:34:58,462 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:34:58,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:58,464 INFO L85 PathProgramCache]: Analyzing trace with hash 2104031886, now seen corresponding path program 1 times [2022-11-16 19:34:58,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:34:58,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941292775] [2022-11-16 19:34:58,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:58,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:34:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:59,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 19:34:59,819 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.InterpolantChecker.checkInductivity(InterpolantChecker.java:409) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:383) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:154) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:260) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:237) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:848) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:776) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:343) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:343) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:198) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:282) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:296) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:232) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:34:59,823 INFO L158 Benchmark]: Toolchain (without parser) took 3924.91ms. Allocated memory was 134.2MB in the beginning and 169.9MB in the end (delta: 35.7MB). Free memory was 97.0MB in the beginning and 134.6MB in the end (delta: -37.6MB). Peak memory consumption was 75.8MB. Max. memory is 16.1GB. [2022-11-16 19:34:59,823 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 134.2MB. Free memory was 114.2MB in the beginning and 114.1MB in the end (delta: 79.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 19:34:59,824 INFO L158 Benchmark]: CACSL2BoogieTranslator took 346.32ms. Allocated memory is still 134.2MB. Free memory was 96.7MB in the beginning and 108.9MB in the end (delta: -12.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 19:34:59,824 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.86ms. Allocated memory is still 134.2MB. Free memory was 108.5MB in the beginning and 106.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 19:34:59,825 INFO L158 Benchmark]: Boogie Preprocessor took 53.75ms. Allocated memory is still 134.2MB. Free memory was 106.4MB in the beginning and 104.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 19:34:59,825 INFO L158 Benchmark]: RCFGBuilder took 658.21ms. Allocated memory is still 134.2MB. Free memory was 104.7MB in the beginning and 82.0MB in the end (delta: 22.7MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-11-16 19:34:59,826 INFO L158 Benchmark]: TraceAbstraction took 2807.65ms. Allocated memory was 134.2MB in the beginning and 169.9MB in the end (delta: 35.7MB). Free memory was 81.2MB in the beginning and 134.6MB in the end (delta: -53.4MB). Peak memory consumption was 61.7MB. Max. memory is 16.1GB. [2022-11-16 19:34:59,828 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 134.2MB. Free memory was 114.2MB in the beginning and 114.1MB in the end (delta: 79.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 346.32ms. Allocated memory is still 134.2MB. Free memory was 96.7MB in the beginning and 108.9MB in the end (delta: -12.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.86ms. Allocated memory is still 134.2MB. Free memory was 108.5MB in the beginning and 106.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.75ms. Allocated memory is still 134.2MB. Free memory was 106.4MB in the beginning and 104.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 658.21ms. Allocated memory is still 134.2MB. Free memory was 104.7MB in the beginning and 82.0MB in the end (delta: 22.7MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 2807.65ms. Allocated memory was 134.2MB in the beginning and 169.9MB in the end (delta: 35.7MB). Free memory was 81.2MB in the beginning and 134.6MB in the end (delta: -53.4MB). Peak memory consumption was 61.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: null: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.InterpolantChecker.checkInductivity(InterpolantChecker.java:409) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-16 19:34:59,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/mbpr4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0 --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 d3770c63a87ff983494c9353997301d9eb30588c650f83b67bcf55f325443055 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 19:35:02,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:35:02,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:35:02,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:35:02,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:35:02,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:35:02,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:35:02,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:35:02,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:35:02,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:35:02,427 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:35:02,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:35:02,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:35:02,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:35:02,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:35:02,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:35:02,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:35:02,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:35:02,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:35:02,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:35:02,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:35:02,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:35:02,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:35:02,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:35:02,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:35:02,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:35:02,475 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:35:02,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:35:02,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:35:02,480 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:35:02,481 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:35:02,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:35:02,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:35:02,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:35:02,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:35:02,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:35:02,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:35:02,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:35:02,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:35:02,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:35:02,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:35:02,499 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-16 19:35:02,547 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:35:02,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:35:02,549 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:35:02,549 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:35:02,550 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:35:02,550 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:35:02,551 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:35:02,551 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:35:02,551 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:35:02,551 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:35:02,552 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:35:02,553 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:35:02,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:35:02,555 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:35:02,555 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:35:02,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:35:02,555 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:35:02,555 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:35:02,556 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:35:02,556 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 19:35:02,556 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 19:35:02,556 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 19:35:02,557 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:35:02,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:35:02,557 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:35:02,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:35:02,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:35:02,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 19:35:02,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:35:02,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:35:02,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:35:02,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:35:02,559 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:35:02,560 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-16 19:35:02,560 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 19:35:02,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:35:02,560 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:35:02,561 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 19:35:02,561 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d3770c63a87ff983494c9353997301d9eb30588c650f83b67bcf55f325443055 [2022-11-16 19:35:02,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:35:03,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:35:03,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:35:03,011 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:35:03,012 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:35:03,014 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-tiling/mbpr4.c [2022-11-16 19:35:03,095 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/data/d8a4b14d7/7ba917596be94614b2b2d0bf9193b667/FLAGc7e127f0c [2022-11-16 19:35:03,628 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:35:03,629 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/sv-benchmarks/c/array-tiling/mbpr4.c [2022-11-16 19:35:03,646 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/data/d8a4b14d7/7ba917596be94614b2b2d0bf9193b667/FLAGc7e127f0c [2022-11-16 19:35:03,963 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/data/d8a4b14d7/7ba917596be94614b2b2d0bf9193b667 [2022-11-16 19:35:03,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:35:03,967 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:35:03,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:35:03,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:35:03,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:35:03,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:35:03" (1/1) ... [2022-11-16 19:35:03,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b66849a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:03, skipping insertion in model container [2022-11-16 19:35:03,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:35:03" (1/1) ... [2022-11-16 19:35:03,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:35:04,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:35:04,180 WARN L229 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_2b0788a0-5e06-4b6c-baef-caa5bac10417/sv-benchmarks/c/array-tiling/mbpr4.c[396,409] [2022-11-16 19:35:04,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:35:04,228 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:35:04,278 WARN L229 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_2b0788a0-5e06-4b6c-baef-caa5bac10417/sv-benchmarks/c/array-tiling/mbpr4.c[396,409] [2022-11-16 19:35:04,339 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:35:04,361 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:35:04,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:04 WrapperNode [2022-11-16 19:35:04,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:35:04,363 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:35:04,363 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:35:04,363 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:35:04,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:04" (1/1) ... [2022-11-16 19:35:04,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:04" (1/1) ... [2022-11-16 19:35:04,409 INFO L138 Inliner]: procedures = 17, calls = 54, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 144 [2022-11-16 19:35:04,410 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:35:04,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:35:04,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:35:04,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:35:04,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:04" (1/1) ... [2022-11-16 19:35:04,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:04" (1/1) ... [2022-11-16 19:35:04,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:04" (1/1) ... [2022-11-16 19:35:04,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:04" (1/1) ... [2022-11-16 19:35:04,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:04" (1/1) ... [2022-11-16 19:35:04,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:04" (1/1) ... [2022-11-16 19:35:04,457 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:04" (1/1) ... [2022-11-16 19:35:04,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:04" (1/1) ... [2022-11-16 19:35:04,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:35:04,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:35:04,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:35:04,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:35:04,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:04" (1/1) ... [2022-11-16 19:35:04,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:35:04,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:35:04,512 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:35:04,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:35:04,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:35:04,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 19:35:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 19:35:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 19:35:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:35:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:35:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 19:35:04,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 19:35:04,676 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:35:04,678 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:35:05,244 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:35:05,251 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:35:05,251 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-16 19:35:05,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:35:05 BoogieIcfgContainer [2022-11-16 19:35:05,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:35:05,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:35:05,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:35:05,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:35:05,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:35:03" (1/3) ... [2022-11-16 19:35:05,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3978c9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:35:05, skipping insertion in model container [2022-11-16 19:35:05,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:04" (2/3) ... [2022-11-16 19:35:05,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3978c9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:35:05, skipping insertion in model container [2022-11-16 19:35:05,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:35:05" (3/3) ... [2022-11-16 19:35:05,273 INFO L112 eAbstractionObserver]: Analyzing ICFG mbpr4.c [2022-11-16 19:35:05,297 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:35:05,298 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 19:35:05,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:35:05,406 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2f13450b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:35:05,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 19:35:05,411 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 38 states have internal predecessors, (57), 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) [2022-11-16 19:35:05,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 19:35:05,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:35:05,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:35:05,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:35:05,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:35:05,431 INFO L85 PathProgramCache]: Analyzing trace with hash -912130766, now seen corresponding path program 1 times [2022-11-16 19:35:05,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:35:05,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270407750] [2022-11-16 19:35:05,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:05,461 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:35:05,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:35:05,467 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:35:05,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-16 19:35:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:05,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-16 19:35:05,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:05,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:35:05,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:35:05,594 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:35:05,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270407750] [2022-11-16 19:35:05,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270407750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:35:05,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:35:05,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:35:05,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258981352] [2022-11-16 19:35:05,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:35:05,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 19:35:05,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:35:05,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 19:35:05,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 19:35:05,645 INFO L87 Difference]: Start difference. First operand has 39 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 38 states have internal predecessors, (57), 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 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:35:05,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:35:05,664 INFO L93 Difference]: Finished difference Result 73 states and 106 transitions. [2022-11-16 19:35:05,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 19:35:05,668 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 19:35:05,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:35:05,675 INFO L225 Difference]: With dead ends: 73 [2022-11-16 19:35:05,676 INFO L226 Difference]: Without dead ends: 34 [2022-11-16 19:35:05,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 19:35:05,682 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:35:05,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:35:05,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-16 19:35:05,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-16 19:35:05,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 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) [2022-11-16 19:35:05,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-11-16 19:35:05,716 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 19 [2022-11-16 19:35:05,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:35:05,716 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-11-16 19:35:05,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:35:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-11-16 19:35:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 19:35:05,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:35:05,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:35:05,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-16 19:35:05,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:35:05,923 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:35:05,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:35:05,924 INFO L85 PathProgramCache]: Analyzing trace with hash 560162573, now seen corresponding path program 1 times [2022-11-16 19:35:05,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:35:05,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [201825758] [2022-11-16 19:35:05,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:05,931 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:35:05,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:35:05,933 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:35:05,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-16 19:35:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:05,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 19:35:06,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:35:06,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:35:06,139 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:35:06,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [201825758] [2022-11-16 19:35:06,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [201825758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:35:06,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:35:06,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:35:06,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893920404] [2022-11-16 19:35:06,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:35:06,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:35:06,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:35:06,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:35:06,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:35:06,143 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:35:06,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:35:06,745 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2022-11-16 19:35:06,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:35:06,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 19:35:06,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:35:06,747 INFO L225 Difference]: With dead ends: 74 [2022-11-16 19:35:06,748 INFO L226 Difference]: Without dead ends: 50 [2022-11-16 19:35:06,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:35:06,750 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 115 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:35:06,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 24 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 19:35:06,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-16 19:35:06,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2022-11-16 19:35:06,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 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) [2022-11-16 19:35:06,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-11-16 19:35:06,764 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 19 [2022-11-16 19:35:06,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:35:06,765 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-11-16 19:35:06,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:35:06,765 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-11-16 19:35:06,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 19:35:06,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:35:06,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:35:06,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-16 19:35:06,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:35:06,981 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:35:06,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:35:06,994 INFO L85 PathProgramCache]: Analyzing trace with hash -847048967, now seen corresponding path program 1 times [2022-11-16 19:35:06,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:35:06,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711089315] [2022-11-16 19:35:06,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:06,995 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:35:06,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:35:06,998 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:35:07,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-16 19:35:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:07,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:35:07,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:35:07,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:35:07,387 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:35:07,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711089315] [2022-11-16 19:35:07,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [711089315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:35:07,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:35:07,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:35:07,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494372107] [2022-11-16 19:35:07,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:35:07,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:35:07,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:35:07,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:35:07,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:35:07,390 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-11-16 19:35:07,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:35:07,459 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-11-16 19:35:07,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:35:07,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 35 [2022-11-16 19:35:07,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:35:07,462 INFO L225 Difference]: With dead ends: 51 [2022-11-16 19:35:07,464 INFO L226 Difference]: Without dead ends: 38 [2022-11-16 19:35:07,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:35:07,466 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:35:07,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 35 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:35:07,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-16 19:35:07,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-16 19:35:07,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 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) [2022-11-16 19:35:07,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-11-16 19:35:07,480 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 35 [2022-11-16 19:35:07,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:35:07,480 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-11-16 19:35:07,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-11-16 19:35:07,481 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-11-16 19:35:07,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 19:35:07,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:35:07,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:35:07,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-16 19:35:07,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:35:07,695 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:35:07,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:35:07,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1240075977, now seen corresponding path program 1 times [2022-11-16 19:35:07,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:35:07,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934625811] [2022-11-16 19:35:07,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:07,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:35:07,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:35:07,703 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:35:07,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-16 19:35:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:07,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 19:35:07,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 19:35:07,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:35:07,899 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:35:07,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934625811] [2022-11-16 19:35:07,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934625811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:35:07,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:35:07,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:35:07,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34960144] [2022-11-16 19:35:07,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:35:07,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:35:07,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:35:07,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:35:07,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:35:07,902 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2022-11-16 19:35:07,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:35:07,959 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2022-11-16 19:35:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:35:07,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 35 [2022-11-16 19:35:07,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:35:07,961 INFO L225 Difference]: With dead ends: 48 [2022-11-16 19:35:07,961 INFO L226 Difference]: Without dead ends: 46 [2022-11-16 19:35:07,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:35:07,963 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:35:07,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 118 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:35:07,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-16 19:35:07,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-11-16 19:35:07,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 39 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) [2022-11-16 19:35:07,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-11-16 19:35:07,978 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 35 [2022-11-16 19:35:07,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:35:07,979 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-11-16 19:35:07,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2022-11-16 19:35:07,979 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-11-16 19:35:07,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 19:35:07,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:35:07,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:35:08,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-16 19:35:08,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:35:08,193 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:35:08,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:35:08,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1240016395, now seen corresponding path program 1 times [2022-11-16 19:35:08,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:35:08,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721282318] [2022-11-16 19:35:08,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:08,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:35:08,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:35:08,196 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:35:08,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-16 19:35:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:08,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 19:35:08,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:08,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:35:08,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:08,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:08,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:08,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2022-11-16 19:35:08,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:35:08,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:08,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:08,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-11-16 19:35:08,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:35:09,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:09,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:09,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-11-16 19:35:09,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:35:09,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:09,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:09,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-11-16 19:35:09,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 19:35:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:35:09,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:10,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:35:10,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-16 19:35:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:35:10,196 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:35:10,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721282318] [2022-11-16 19:35:10,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721282318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:10,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1072823339] [2022-11-16 19:35:10,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:10,197 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:35:10,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:35:10,203 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:35:10,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-16 19:35:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:10,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 19:35:10,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:10,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:35:10,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:10,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:10,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:10,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2022-11-16 19:35:10,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:35:11,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:11,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:11,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-11-16 19:35:11,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:35:11,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:11,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:11,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-11-16 19:35:11,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:35:11,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:11,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:11,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-11-16 19:35:11,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 19:35:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:35:11,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:11,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:35:11,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-16 19:35:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:35:12,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1072823339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:12,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165512890] [2022-11-16 19:35:12,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:12,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:35:12,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:35:12,038 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:35:12,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 19:35:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:12,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 19:35:12,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:12,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:35:12,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:12,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:12,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:12,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2022-11-16 19:35:12,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:35:12,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:12,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:12,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-11-16 19:35:12,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:35:12,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:12,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:12,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-11-16 19:35:12,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:35:12,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:12,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:12,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-11-16 19:35:12,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 19:35:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:35:12,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:13,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:35:13,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-16 19:35:13,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:35:13,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165512890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:13,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:35:13,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8, 7] total 12 [2022-11-16 19:35:13,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759976789] [2022-11-16 19:35:13,334 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:35:13,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 19:35:13,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:35:13,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 19:35:13,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 19:35:13,336 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 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) [2022-11-16 19:35:14,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:35:14,311 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2022-11-16 19:35:14,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 19:35:14,312 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 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 35 [2022-11-16 19:35:14,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:35:14,314 INFO L225 Difference]: With dead ends: 105 [2022-11-16 19:35:14,314 INFO L226 Difference]: Without dead ends: 72 [2022-11-16 19:35:14,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 164 SyntacticMatches, 30 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2022-11-16 19:35:14,316 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 173 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:35:14,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 77 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 19:35:14,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-16 19:35:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 42. [2022-11-16 19:35:14,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:35:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-11-16 19:35:14,326 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 35 [2022-11-16 19:35:14,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:35:14,327 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-11-16 19:35:14,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 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) [2022-11-16 19:35:14,327 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-11-16 19:35:14,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 19:35:14,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:35:14,329 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:35:14,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 19:35:14,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-16 19:35:14,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-16 19:35:14,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 19:35:14,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:35:14,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:35:14,940 INFO L85 PathProgramCache]: Analyzing trace with hash 505076392, now seen corresponding path program 1 times [2022-11-16 19:35:14,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:35:14,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767825555] [2022-11-16 19:35:14,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:14,941 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:35:14,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:35:14,942 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:35:14,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-16 19:35:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:15,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 19:35:15,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:15,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:35:15,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:15,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:15,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:15,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2022-11-16 19:35:15,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:35:15,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:15,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:15,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-11-16 19:35:15,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:35:15,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:15,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:15,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-11-16 19:35:15,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 19:35:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:35:15,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:18,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 19:35:18,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 19:35:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:35:19,105 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:35:19,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767825555] [2022-11-16 19:35:19,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767825555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:19,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1891694688] [2022-11-16 19:35:19,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:19,105 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:35:19,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:35:19,107 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:35:19,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-16 19:35:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:19,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 19:35:19,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:19,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:35:19,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:19,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:19,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:19,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2022-11-16 19:35:19,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:35:19,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:19,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:19,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-11-16 19:35:19,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:35:19,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:19,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:19,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-11-16 19:35:20,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 19:35:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:35:20,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:23,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 19:35:23,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 19:35:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:35:23,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1891694688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:23,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108726191] [2022-11-16 19:35:23,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:23,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:35:23,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:35:23,407 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:35:23,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 19:35:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:23,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 19:35:23,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:23,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:35:23,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:23,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:23,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:23,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2022-11-16 19:35:23,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:35:23,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:23,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:23,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-11-16 19:35:23,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:35:23,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:23,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:23,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-11-16 19:35:24,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 19:35:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:35:24,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:27,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 19:35:27,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 19:35:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:35:27,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108726191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:27,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:35:27,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 13 [2022-11-16 19:35:27,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684748682] [2022-11-16 19:35:27,288 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:35:27,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 19:35:27,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:35:27,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 19:35:27,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-16 19:35:27,289 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 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) [2022-11-16 19:35:28,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:35:28,348 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2022-11-16 19:35:28,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 19:35:28,348 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 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 41 [2022-11-16 19:35:28,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:35:28,349 INFO L225 Difference]: With dead ends: 101 [2022-11-16 19:35:28,349 INFO L226 Difference]: Without dead ends: 72 [2022-11-16 19:35:28,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 205 SyntacticMatches, 24 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:35:28,351 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 188 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:35:28,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 75 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 19:35:28,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-16 19:35:28,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2022-11-16 19:35:28,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:35:28,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-11-16 19:35:28,362 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 41 [2022-11-16 19:35:28,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:35:28,362 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-11-16 19:35:28,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 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) [2022-11-16 19:35:28,363 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-11-16 19:35:28,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 19:35:28,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:35:28,364 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:35:28,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-16 19:35:28,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 19:35:28,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-16 19:35:28,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:35:28,975 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:35:28,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:35:28,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1880770843, now seen corresponding path program 2 times [2022-11-16 19:35:28,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:35:28,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540213724] [2022-11-16 19:35:28,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:35:28,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:35:28,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:35:28,977 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:35:28,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-16 19:35:29,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:35:29,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:35:29,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 19:35:29,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:29,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:35:29,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:29,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:29,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:29,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2022-11-16 19:35:29,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:35:29,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:29,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:29,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-11-16 19:35:29,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 19:35:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:35:29,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:31,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 19:35:31,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 19:35:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:35:31,252 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:35:31,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540213724] [2022-11-16 19:35:31,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540213724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:31,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1678193897] [2022-11-16 19:35:31,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:35:31,253 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:35:31,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:35:31,255 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:35:31,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-16 19:35:31,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:35:31,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:35:31,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 19:35:31,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:31,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:35:31,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:31,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:31,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:31,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2022-11-16 19:35:31,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:35:31,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:31,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:31,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-11-16 19:35:32,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 19:35:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:35:32,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:35,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 19:35:35,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 19:35:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:35:35,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1678193897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:35,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694864704] [2022-11-16 19:35:35,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:35:35,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:35:35,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:35:35,583 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:35:35,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 19:35:35,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:35:35,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:35:35,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 19:35:35,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:35,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:35:36,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:36,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:36,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:36,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2022-11-16 19:35:36,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:35:36,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:36,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:36,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-11-16 19:35:36,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 19:35:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:35:36,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:37,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 19:35:37,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 19:35:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:35:38,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694864704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:38,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:35:38,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 10, 9, 9] total 16 [2022-11-16 19:35:38,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091859571] [2022-11-16 19:35:38,064 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:35:38,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 19:35:38,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:35:38,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 19:35:38,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=190, Unknown=1, NotChecked=0, Total=240 [2022-11-16 19:35:38,066 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 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) [2022-11-16 19:35:39,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:35:39,552 INFO L93 Difference]: Finished difference Result 110 states and 125 transitions. [2022-11-16 19:35:39,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 19:35:39,554 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 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 47 [2022-11-16 19:35:39,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:35:39,556 INFO L225 Difference]: With dead ends: 110 [2022-11-16 19:35:39,556 INFO L226 Difference]: Without dead ends: 81 [2022-11-16 19:35:39,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 248 SyntacticMatches, 16 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=145, Invalid=454, Unknown=1, NotChecked=0, Total=600 [2022-11-16 19:35:39,557 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 162 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:35:39,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 101 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 293 Invalid, 0 Unknown, 4 Unchecked, 1.1s Time] [2022-11-16 19:35:39,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-16 19:35:39,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2022-11-16 19:35:39,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:35:39,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2022-11-16 19:35:39,590 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 47 [2022-11-16 19:35:39,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:35:39,591 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2022-11-16 19:35:39,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 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) [2022-11-16 19:35:39,592 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2022-11-16 19:35:39,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-16 19:35:39,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:35:39,597 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:35:39,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-16 19:35:39,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-16 19:35:40,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-16 19:35:40,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 19:35:40,214 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:35:40,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:35:40,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1212426930, now seen corresponding path program 3 times [2022-11-16 19:35:40,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:35:40,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421616743] [2022-11-16 19:35:40,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:35:40,215 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:35:40,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:35:40,217 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:35:40,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-16 19:35:40,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 19:35:40,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:35:40,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 19:35:40,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:40,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:35:40,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:40,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:40,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:40,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2022-11-16 19:35:40,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:35:40,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:40,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:40,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-11-16 19:35:40,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:35:40,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:40,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:40,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-11-16 19:35:41,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:35:41,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:41,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:41,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:41,132 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:41,133 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 42 treesize of output 41 [2022-11-16 19:35:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:35:41,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:35:43,263 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:35:43,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421616743] [2022-11-16 19:35:43,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421616743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:43,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [928430648] [2022-11-16 19:35:43,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:35:43,264 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:35:43,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:35:43,266 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:35:43,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-16 19:35:43,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 19:35:43,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:35:43,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-16 19:35:43,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:44,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:44,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 19:35:44,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:44,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:44,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:44,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:44,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:44,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:44,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:44,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 49 [2022-11-16 19:35:44,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:44,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:44,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:44,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-11-16 19:35:45,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:45,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:45,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:45,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:45,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:45,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:45,101 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:45,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 52 [2022-11-16 19:35:45,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:45,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:45,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:45,466 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:45,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 54 [2022-11-16 19:35:45,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:45,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:45,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:45,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:45,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:45,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:45,682 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:45,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 55 [2022-11-16 19:35:46,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:46,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:46,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:46,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:46,076 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:46,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 69 [2022-11-16 19:35:46,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:46,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:46,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:46,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:46,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:46,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:46,336 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:46,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 80 treesize of output 58 [2022-11-16 19:35:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:35:48,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:35:48,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [928430648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:48,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462411702] [2022-11-16 19:35:48,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:35:48,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:35:48,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:35:48,603 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:35:48,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 19:35:50,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 19:35:50,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:35:50,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 19:35:50,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:50,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:35:50,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:50,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:50,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:50,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2022-11-16 19:35:51,494 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:35:51,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:52,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 19:35:52,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-16 19:35:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:35:52,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462411702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:52,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:35:52,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 18, 11, 12, 10] total 51 [2022-11-16 19:35:52,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643265246] [2022-11-16 19:35:52,549 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:35:52,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-16 19:35:52,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:35:52,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-16 19:35:52,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=2195, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 19:35:52,553 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 51 states, 51 states have (on average 4.470588235294118) internal successors, (228), 51 states have internal predecessors, (228), 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) [2022-11-16 19:35:59,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:35:59,167 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2022-11-16 19:35:59,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 19:35:59,168 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.470588235294118) internal successors, (228), 51 states have internal predecessors, (228), 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 53 [2022-11-16 19:35:59,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:35:59,169 INFO L225 Difference]: With dead ends: 107 [2022-11-16 19:35:59,170 INFO L226 Difference]: Without dead ends: 97 [2022-11-16 19:35:59,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 252 SyntacticMatches, 12 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2062 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1148, Invalid=5014, Unknown=0, NotChecked=0, Total=6162 [2022-11-16 19:35:59,174 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 686 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:35:59,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 151 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-16 19:35:59,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-16 19:35:59,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 60. [2022-11-16 19:35:59,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 59 states have internal predecessors, (65), 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) [2022-11-16 19:35:59,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2022-11-16 19:35:59,194 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 53 [2022-11-16 19:35:59,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:35:59,194 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2022-11-16 19:35:59,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.470588235294118) internal successors, (228), 51 states have internal predecessors, (228), 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) [2022-11-16 19:35:59,195 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2022-11-16 19:35:59,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-16 19:35:59,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:35:59,197 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:35:59,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-16 19:35:59,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-16 19:35:59,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 19:35:59,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:35:59,803 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:35:59,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:35:59,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1567953279, now seen corresponding path program 4 times [2022-11-16 19:35:59,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:35:59,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967284940] [2022-11-16 19:35:59,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:35:59,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:35:59,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:35:59,806 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:35:59,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-16 19:35:59,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:35:59,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:35:59,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 19:35:59,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:36:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:36:06,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:36:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:36:09,927 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:36:09,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967284940] [2022-11-16 19:36:09,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967284940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:36:09,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [244120221] [2022-11-16 19:36:09,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:36:09,927 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:36:09,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:36:09,929 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:36:09,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-16 19:36:10,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:36:10,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:36:10,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 19:36:10,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:36:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:36:14,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:36:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:36:16,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [244120221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:36:16,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999323104] [2022-11-16 19:36:16,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:36:16,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:36:16,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:36:16,265 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:36:16,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 19:36:16,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:36:16,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:36:16,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 19:36:16,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:36:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:36:21,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:36:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:36:21,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999323104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:36:21,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:36:21,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12, 12, 12, 11] total 22 [2022-11-16 19:36:21,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168840691] [2022-11-16 19:36:21,890 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:36:21,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 19:36:21,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:36:21,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 19:36:21,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2022-11-16 19:36:21,893 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 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) [2022-11-16 19:36:27,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:36:27,394 INFO L93 Difference]: Finished difference Result 179 states and 195 transitions. [2022-11-16 19:36:27,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 19:36:27,401 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 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 59 [2022-11-16 19:36:27,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:36:27,402 INFO L225 Difference]: With dead ends: 179 [2022-11-16 19:36:27,402 INFO L226 Difference]: Without dead ends: 88 [2022-11-16 19:36:27,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2022-11-16 19:36:27,404 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 298 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:36:27,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 173 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-16 19:36:27,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-16 19:36:27,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 76. [2022-11-16 19:36:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.08) internal successors, (81), 75 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:36:27,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2022-11-16 19:36:27,427 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 59 [2022-11-16 19:36:27,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:36:27,428 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2022-11-16 19:36:27,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 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) [2022-11-16 19:36:27,428 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2022-11-16 19:36:27,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-16 19:36:27,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:36:27,430 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:36:27,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-16 19:36:27,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-16 19:36:27,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 19:36:28,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:36:28,034 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:36:28,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:36:28,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1442813609, now seen corresponding path program 5 times [2022-11-16 19:36:28,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:36:28,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146701662] [2022-11-16 19:36:28,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 19:36:28,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:36:28,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:36:28,037 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:36:28,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-16 19:36:28,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-16 19:36:28,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:36:29,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-16 19:36:29,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:36:29,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:36:29,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2022-11-16 19:36:29,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:29,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:36:29,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:29,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:29,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:29,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-16 19:36:29,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:36:29,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-11-16 19:36:29,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:29,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:36:29,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:29,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:29,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:29,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-16 19:36:29,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:36:29,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-11-16 19:36:29,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:29,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:36:29,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:29,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:29,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:29,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-16 19:36:29,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:36:29,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-11-16 19:36:31,032 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:31,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 20 [2022-11-16 19:36:31,064 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:36:31,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:36:38,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 19:36:38,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 19:36:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 19:36:38,688 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:36:38,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146701662] [2022-11-16 19:36:38,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146701662] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:36:38,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [125924641] [2022-11-16 19:36:38,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 19:36:38,689 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:36:38,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:36:38,691 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:36:38,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-16 19:37:04,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-16 19:37:04,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:37:05,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-16 19:37:05,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:37:05,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:37:05,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2022-11-16 19:37:05,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:37:05,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:37:05,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:37:05,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:37:05,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:37:05,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-16 19:37:06,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:37:06,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-11-16 19:37:06,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:37:06,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:37:06,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:37:06,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:37:06,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:37:06,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-16 19:37:06,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:37:06,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-11-16 19:37:06,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:37:06,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:37:06,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:37:06,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:37:06,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:37:06,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-16 19:37:06,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:37:06,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-11-16 19:37:07,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 19:37:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:07,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:37:13,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 19:37:13,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 19:37:13,477 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 19:37:13,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [125924641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:37:13,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818067602] [2022-11-16 19:37:13,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 19:37:13,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:37:13,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:37:13,480 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:37:13,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 19:37:59,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-16 19:37:59,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:37:59,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-16 19:37:59,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:37:59,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:37:59,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2022-11-16 19:37:59,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:37:59,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:37:59,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:37:59,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:37:59,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:37:59,837 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:37:59,838 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 51 treesize of output 49 [2022-11-16 19:37:59,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:37:59,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-11-16 19:38:00,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:38:00,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:38:00,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:38:00,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:38:00,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:38:00,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-16 19:38:00,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:38:00,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-11-16 19:38:00,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:38:00,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:38:00,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:38:00,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:38:00,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:38:00,280 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:38:00,281 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 51 treesize of output 49 [2022-11-16 19:38:00,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:38:00,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-11-16 19:38:00,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 19:38:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:38:00,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:38:07,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 19:38:07,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 19:38:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 54 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 19:38:07,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818067602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:38:07,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:38:07,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 15, 14, 12, 13] total 55 [2022-11-16 19:38:07,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141963357] [2022-11-16 19:38:07,729 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:38:07,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-16 19:38:07,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:38:07,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-16 19:38:07,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=2545, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 19:38:07,733 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 55 states, 55 states have (on average 5.163636363636364) internal successors, (284), 55 states have internal predecessors, (284), 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) [2022-11-16 19:38:21,319 WARN L233 SmtUtils]: Spent 12.08s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:38:23,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:38:25,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:38:30,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:38:32,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:38:36,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:38:38,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:38:40,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:38:42,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:38:44,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:38:46,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:38:48,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:39:00,651 WARN L233 SmtUtils]: Spent 12.09s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:39:02,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:39:04,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:39:06,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:39:09,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:39:11,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:39:13,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:39:15,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:39:17,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:39:19,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:39:40,237 WARN L233 SmtUtils]: Spent 20.17s on a formula simplification. DAG size of input: 34 DAG size of output: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:39:42,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:39:44,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:39:48,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:39:48,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:39:48,193 INFO L93 Difference]: Finished difference Result 181 states and 200 transitions. [2022-11-16 19:39:48,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 19:39:48,194 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 5.163636363636364) internal successors, (284), 55 states have internal predecessors, (284), 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 75 [2022-11-16 19:39:48,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:39:48,196 INFO L225 Difference]: With dead ends: 181 [2022-11-16 19:39:48,196 INFO L226 Difference]: Without dead ends: 171 [2022-11-16 19:39:48,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 369 SyntacticMatches, 47 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4109 ImplicationChecksByTransitivity, 67.3s TimeCoverageRelationStatistics Valid=1488, Invalid=6522, Unknown=0, NotChecked=0, Total=8010 [2022-11-16 19:39:48,198 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 808 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 325 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 2181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 52.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:39:48,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [808 Valid, 294 Invalid, 2181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1620 Invalid, 23 Unknown, 213 Unchecked, 52.0s Time] [2022-11-16 19:39:48,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-16 19:39:48,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 82. [2022-11-16 19:39:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0740740740740742) internal successors, (87), 81 states have internal predecessors, (87), 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) [2022-11-16 19:39:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2022-11-16 19:39:48,229 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 75 [2022-11-16 19:39:48,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:39:48,230 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2022-11-16 19:39:48,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 5.163636363636364) internal successors, (284), 55 states have internal predecessors, (284), 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) [2022-11-16 19:39:48,231 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2022-11-16 19:39:48,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-16 19:39:48,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:39:48,232 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:39:48,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 19:39:48,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-16 19:39:48,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-16 19:39:48,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 19:39:48,843 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:39:48,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:39:48,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1969766492, now seen corresponding path program 6 times [2022-11-16 19:39:48,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:39:48,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369425281] [2022-11-16 19:39:48,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 19:39:48,845 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:39:48,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:39:48,855 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:39:48,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-16 19:39:49,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-16 19:39:49,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:39:49,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 19:39:49,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:39:49,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:39:49,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 52 [2022-11-16 19:39:49,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-11-16 19:39:50,011 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:39:50,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 52 [2022-11-16 19:39:50,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:39:50,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:39:50,204 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:39:50,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-11-16 19:39:50,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:39:50,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:39:50,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:39:50,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:39:50,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:39:50,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:39:50,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2022-11-16 19:39:50,353 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:39:50,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2022-11-16 19:39:50,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:39:50,383 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 54 treesize of output 43 [2022-11-16 19:39:50,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:39:50,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:39:50,521 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:39:50,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-11-16 19:39:50,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:39:50,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:39:50,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:39:50,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:39:50,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:39:50,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:39:50,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2022-11-16 19:39:50,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:39:50,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2022-11-16 19:39:50,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:39:50,740 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 54 treesize of output 43 [2022-11-16 19:39:51,828 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:39:51,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2022-11-16 19:39:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 88 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 19:39:51,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:40:38,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:40:38,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:40:38,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 112 [2022-11-16 19:40:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 76 refuted. 10 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 19:40:38,493 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:40:38,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369425281] [2022-11-16 19:40:38,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369425281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:40:38,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [328641700] [2022-11-16 19:40:38,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 19:40:38,494 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:40:38,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:40:38,503 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:40:38,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-16 19:40:41,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-16 19:40:41,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:40:41,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 19:40:41,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:40:41,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:40:41,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 52 [2022-11-16 19:40:41,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-11-16 19:40:41,716 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:40:41,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 52 [2022-11-16 19:40:41,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:41,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:41,857 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:40:41,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-11-16 19:40:41,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:41,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:40:41,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:41,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:41,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:41,898 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:40:41,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2022-11-16 19:40:42,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:40:42,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2022-11-16 19:40:42,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:40:42,094 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 54 treesize of output 43 [2022-11-16 19:40:42,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:42,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:42,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:40:42,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-11-16 19:40:42,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:42,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:40:42,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:42,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:42,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:42,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:40:42,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2022-11-16 19:40:42,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:40:42,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2022-11-16 19:40:42,483 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:40:42,483 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 54 treesize of output 43 [2022-11-16 19:40:43,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:40:43,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2022-11-16 19:40:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 88 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 19:40:43,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:41:21,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:41:21,579 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:41:21,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 112 [2022-11-16 19:41:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 76 refuted. 10 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 19:41:21,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [328641700] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:41:21,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809243330] [2022-11-16 19:41:21,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 19:41:21,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:21,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:41:21,829 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:41:21,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 19:41:34,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-16 19:41:34,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:41:34,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-16 19:41:34,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:41:34,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:41:35,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2022-11-16 19:41:35,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:35,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:41:35,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:35,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:35,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:35,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-16 19:41:35,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:41:35,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-11-16 19:41:35,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:35,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:41:35,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:35,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:35,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:35,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-16 19:41:35,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:41:35,897 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:41:35,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2022-11-16 19:41:36,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 19:41:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:41:36,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:42:16,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 19:42:16,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 19:42:16,867 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 84 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:42:16,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809243330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:42:16,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:42:16,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 15, 18, 13, 15] total 45 [2022-11-16 19:42:16,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667485458] [2022-11-16 19:42:16,868 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:42:16,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-16 19:42:16,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:42:16,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-16 19:42:16,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1652, Unknown=12, NotChecked=0, Total=1980 [2022-11-16 19:42:16,870 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 45 states, 45 states have (on average 5.733333333333333) internal successors, (258), 45 states have internal predecessors, (258), 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) [2022-11-16 19:42:21,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:42:51,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:42:53,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:43:31,749 WARN L233 SmtUtils]: Spent 8.39s on a formula simplification. DAG size of input: 49 DAG size of output: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:45:12,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:45:12,195 INFO L93 Difference]: Finished difference Result 336 states and 360 transitions. [2022-11-16 19:45:12,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-16 19:45:12,196 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 5.733333333333333) internal successors, (258), 45 states have internal predecessors, (258), 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 81 [2022-11-16 19:45:12,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:45:12,198 INFO L225 Difference]: With dead ends: 336 [2022-11-16 19:45:12,199 INFO L226 Difference]: Without dead ends: 326 [2022-11-16 19:45:12,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 416 SyntacticMatches, 75 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6202 ImplicationChecksByTransitivity, 288.4s TimeCoverageRelationStatistics Valid=1497, Invalid=10015, Unknown=44, NotChecked=0, Total=11556 [2022-11-16 19:45:12,202 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 871 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 147 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 1814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:45:12,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [871 Valid, 571 Invalid, 1814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1264 Invalid, 3 Unknown, 400 Unchecked, 10.5s Time] [2022-11-16 19:45:12,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-11-16 19:45:12,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 137. [2022-11-16 19:45:12,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0735294117647058) internal successors, (146), 136 states have internal predecessors, (146), 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) [2022-11-16 19:45:12,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 146 transitions. [2022-11-16 19:45:12,253 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 146 transitions. Word has length 81 [2022-11-16 19:45:12,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:45:12,253 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 146 transitions. [2022-11-16 19:45:12,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.733333333333333) internal successors, (258), 45 states have internal predecessors, (258), 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) [2022-11-16 19:45:12,254 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 146 transitions. [2022-11-16 19:45:12,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-16 19:45:12,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:45:12,256 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:45:12,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-16 19:45:12,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 19:45:12,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-16 19:45:12,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 19:45:12,867 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:45:12,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:45:12,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1625921487, now seen corresponding path program 7 times [2022-11-16 19:45:12,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:45:12,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517385091] [2022-11-16 19:45:12,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:45:12,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:45:12,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:45:12,870 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:45:12,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-16 19:45:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:45:13,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 19:45:13,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:45:13,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:45:13,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2022-11-16 19:45:13,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:13,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:45:13,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:13,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:13,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:13,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-16 19:45:13,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:45:13,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-11-16 19:45:14,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 19:45:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 119 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 19:45:14,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:45:18,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 19:45:18,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 19:45:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 112 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 19:45:18,669 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:45:18,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517385091] [2022-11-16 19:45:18,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517385091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:45:18,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [814773301] [2022-11-16 19:45:18,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:45:18,670 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:45:18,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:45:18,671 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:45:18,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-16 19:45:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:45:20,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 19:45:20,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:45:21,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:45:21,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2022-11-16 19:45:21,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:21,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:45:21,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:21,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:21,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:21,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-16 19:45:21,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:45:21,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-11-16 19:45:21,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 19:45:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 119 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 19:45:21,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:45:24,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 19:45:24,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 19:45:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 112 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 19:45:24,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [814773301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:45:24,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232004056] [2022-11-16 19:45:24,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:45:24,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:45:24,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:45:24,933 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:45:24,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 19:45:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:45:25,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 19:45:25,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:45:25,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:45:25,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2022-11-16 19:45:25,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:25,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:45:25,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:25,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:25,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:25,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-16 19:45:25,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:45:25,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-11-16 19:45:26,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 19:45:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 119 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 19:45:26,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:45:33,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 19:45:33,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 19:45:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 112 refuted. 1 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 19:45:33,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232004056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:45:33,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:45:33,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14, 15, 14, 16] total 27 [2022-11-16 19:45:33,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529887929] [2022-11-16 19:45:33,630 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:45:33,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 19:45:33,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:45:33,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 19:45:33,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=602, Unknown=1, NotChecked=0, Total=702 [2022-11-16 19:45:33,632 INFO L87 Difference]: Start difference. First operand 137 states and 146 transitions. Second operand has 27 states, 27 states have (on average 5.888888888888889) internal successors, (159), 27 states have internal predecessors, (159), 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) [2022-11-16 19:45:36,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:45:39,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:45:44,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:45:44,003 INFO L93 Difference]: Finished difference Result 318 states and 338 transitions. [2022-11-16 19:45:44,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-16 19:45:44,003 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.888888888888889) internal successors, (159), 27 states have internal predecessors, (159), 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 87 [2022-11-16 19:45:44,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:45:44,005 INFO L225 Difference]: With dead ends: 318 [2022-11-16 19:45:44,005 INFO L226 Difference]: Without dead ends: 308 [2022-11-16 19:45:44,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 480 SyntacticMatches, 31 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=564, Invalid=3857, Unknown=1, NotChecked=0, Total=4422 [2022-11-16 19:45:44,006 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 655 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 66 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:45:44,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 379 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 811 Invalid, 2 Unknown, 134 Unchecked, 6.1s Time] [2022-11-16 19:45:44,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-16 19:45:44,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 157. [2022-11-16 19:45:44,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0769230769230769) internal successors, (168), 156 states have internal predecessors, (168), 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) [2022-11-16 19:45:44,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 168 transitions. [2022-11-16 19:45:44,055 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 168 transitions. Word has length 87 [2022-11-16 19:45:44,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:45:44,055 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 168 transitions. [2022-11-16 19:45:44,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.888888888888889) internal successors, (159), 27 states have internal predecessors, (159), 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) [2022-11-16 19:45:44,055 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 168 transitions. [2022-11-16 19:45:44,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-16 19:45:44,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:45:44,057 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:45:44,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-16 19:45:44,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-16 19:45:44,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-16 19:45:44,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:45:44,659 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:45:44,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:45:44,660 INFO L85 PathProgramCache]: Analyzing trace with hash -486455342, now seen corresponding path program 8 times [2022-11-16 19:45:44,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:45:44,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460590666] [2022-11-16 19:45:44,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:45:44,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:45:44,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:45:44,661 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:45:44,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-16 19:45:44,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:45:44,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:45:44,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 19:45:44,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:45:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-16 19:45:47,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:45:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-16 19:45:51,711 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:45:51,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460590666] [2022-11-16 19:45:51,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460590666] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:45:51,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1908532835] [2022-11-16 19:45:51,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:45:51,712 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:45:51,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:45:51,713 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:45:51,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-16 19:45:52,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:45:52,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:45:52,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 19:45:52,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:45:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-16 19:45:53,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:45:54,402 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-16 19:45:54,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1908532835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:45:54,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088095304] [2022-11-16 19:45:54,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:45:54,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:45:54,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:45:54,404 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:45:54,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-16 19:45:54,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:45:54,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:45:54,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 19:45:54,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:45:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-16 19:45:55,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:45:56,970 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-16 19:45:56,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088095304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:45:56,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:45:56,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 19 [2022-11-16 19:45:56,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234511065] [2022-11-16 19:45:56,971 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:45:56,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 19:45:56,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:45:56,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 19:45:56,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-11-16 19:45:56,973 INFO L87 Difference]: Start difference. First operand 157 states and 168 transitions. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 19 states have internal predecessors, (75), 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) [2022-11-16 19:46:04,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:46:04,917 INFO L93 Difference]: Finished difference Result 448 states and 480 transitions. [2022-11-16 19:46:04,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 19:46:04,922 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 19 states have internal predecessors, (75), 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 89 [2022-11-16 19:46:04,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:46:04,924 INFO L225 Difference]: With dead ends: 448 [2022-11-16 19:46:04,924 INFO L226 Difference]: Without dead ends: 316 [2022-11-16 19:46:04,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 510 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-16 19:46:04,925 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 317 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:46:04,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 102 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-16 19:46:04,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-11-16 19:46:05,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 209. [2022-11-16 19:46:05,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0721153846153846) internal successors, (223), 208 states have internal predecessors, (223), 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) [2022-11-16 19:46:05,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 223 transitions. [2022-11-16 19:46:05,006 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 223 transitions. Word has length 89 [2022-11-16 19:46:05,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:46:05,006 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 223 transitions. [2022-11-16 19:46:05,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 19 states have internal predecessors, (75), 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) [2022-11-16 19:46:05,007 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 223 transitions. [2022-11-16 19:46:05,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-16 19:46:05,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:46:05,008 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:46:05,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-16 19:46:05,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-16 19:46:05,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-16 19:46:05,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:46:05,626 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:46:05,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:46:05,626 INFO L85 PathProgramCache]: Analyzing trace with hash -382055166, now seen corresponding path program 9 times [2022-11-16 19:46:05,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:46:05,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199692515] [2022-11-16 19:46:05,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:46:05,627 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:46:05,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:46:05,628 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:46:05,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-16 19:46:06,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-16 19:46:06,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:46:06,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 19:46:06,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:46:06,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:46:06,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2022-11-16 19:46:07,241 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 19:46:07,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:46:08,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 19:46:08,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-16 19:46:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 19:46:08,349 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:46:08,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199692515] [2022-11-16 19:46:08,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199692515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:46:08,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [599964769] [2022-11-16 19:46:08,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:46:08,349 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:46:08,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:46:08,351 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:46:08,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-16 19:46:12,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-16 19:46:12,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:46:12,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-16 19:46:12,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:46:12,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:46:12,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2022-11-16 19:46:13,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:13,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:46:13,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:13,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:13,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:13,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-16 19:46:13,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:46:13,570 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:46:13,570 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 48 treesize of output 43 [2022-11-16 19:46:13,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:13,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:13,894 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:46:13,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-11-16 19:46:13,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:13,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:13,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:13,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:13,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:13,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:13,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:46:13,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 61 [2022-11-16 19:46:14,104 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:46:14,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2022-11-16 19:46:14,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:46:14,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 46 [2022-11-16 19:46:14,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:14,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:14,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:14,598 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:46:14,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 49 [2022-11-16 19:46:14,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:14,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:14,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:14,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:14,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:14,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:14,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:14,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:14,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:14,651 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:46:14,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 60 treesize of output 73 [2022-11-16 19:46:14,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:46:14,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 58 [2022-11-16 19:46:15,041 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:46:15,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 49 [2022-11-16 19:46:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:46:17,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:46:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 3 proven. 157 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 19:46:21,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [599964769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:46:21,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447753721] [2022-11-16 19:46:21,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:46:21,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:46:21,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:46:21,284 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:46:21,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-16 19:46:28,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-16 19:46:28,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:46:28,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-16 19:46:28,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:46:29,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:46:29,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2022-11-16 19:46:30,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:30,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:46:30,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:30,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:30,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:30,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-16 19:46:30,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:46:30,451 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:46:30,451 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 48 treesize of output 43 [2022-11-16 19:46:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 19:46:32,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:46:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 3 proven. 157 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 19:46:34,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447753721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:46:34,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:46:34,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 26, 17, 21, 17] total 80 [2022-11-16 19:46:34,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7014034] [2022-11-16 19:46:34,792 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:46:34,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-16 19:46:34,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:46:34,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-16 19:46:34,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=5653, Unknown=0, NotChecked=0, Total=6320 [2022-11-16 19:46:34,795 INFO L87 Difference]: Start difference. First operand 209 states and 223 transitions. Second operand has 80 states, 80 states have (on average 4.825) internal successors, (386), 80 states have internal predecessors, (386), 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) [2022-11-16 19:46:38,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:46:42,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:46:44,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:46:49,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:46:51,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:46:53,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:47:03,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:47:03,106 INFO L93 Difference]: Finished difference Result 358 states and 386 transitions. [2022-11-16 19:47:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-16 19:47:03,107 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 4.825) internal successors, (386), 80 states have internal predecessors, (386), 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 93 [2022-11-16 19:47:03,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:47:03,109 INFO L225 Difference]: With dead ends: 358 [2022-11-16 19:47:03,109 INFO L226 Difference]: Without dead ends: 342 [2022-11-16 19:47:03,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 471 SyntacticMatches, 13 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7228 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=2733, Invalid=17573, Unknown=0, NotChecked=0, Total=20306 [2022-11-16 19:47:03,116 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1586 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 3040 mSolverCounterSat, 349 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 3473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 3040 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 19.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:47:03,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1586 Valid, 379 Invalid, 3473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 3040 Invalid, 6 Unknown, 78 Unchecked, 19.6s Time] [2022-11-16 19:47:03,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-11-16 19:47:03,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 142. [2022-11-16 19:47:03,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0638297872340425) internal successors, (150), 141 states have internal predecessors, (150), 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) [2022-11-16 19:47:03,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 150 transitions. [2022-11-16 19:47:03,172 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 150 transitions. Word has length 93 [2022-11-16 19:47:03,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:47:03,172 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 150 transitions. [2022-11-16 19:47:03,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 4.825) internal successors, (386), 80 states have internal predecessors, (386), 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) [2022-11-16 19:47:03,172 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 150 transitions. [2022-11-16 19:47:03,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-16 19:47:03,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:47:03,174 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:47:03,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-16 19:47:03,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-16 19:47:03,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-11-16 19:47:03,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 19:47:03,787 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:47:03,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:47:03,788 INFO L85 PathProgramCache]: Analyzing trace with hash 803205683, now seen corresponding path program 10 times [2022-11-16 19:47:03,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:47:03,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394738445] [2022-11-16 19:47:03,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:47:03,788 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:47:03,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:47:03,789 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:47:03,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-16 19:47:04,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:47:04,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:47:04,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:47:04,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:16,739 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 24 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 19:47:16,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:47:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 24 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 19:47:25,187 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:47:25,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394738445] [2022-11-16 19:47:25,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394738445] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:47:25,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [138148498] [2022-11-16 19:47:25,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:47:25,188 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:47:25,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:47:25,189 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:47:25,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-16 19:47:25,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:47:25,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:47:25,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:47:25,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 24 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 19:47:33,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:47:34,738 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 24 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 19:47:34,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [138148498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:47:34,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678202143] [2022-11-16 19:47:34,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:47:34,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:34,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:47:34,740 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:47:34,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-16 19:47:35,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:47:35,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:47:35,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:47:35,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 24 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 19:47:42,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:47:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 24 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 19:47:44,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678202143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:47:44,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:47:44,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18, 17, 18, 17] total 33 [2022-11-16 19:47:44,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384685646] [2022-11-16 19:47:44,135 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:47:44,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 19:47:44,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:47:44,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 19:47:44,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 19:47:44,138 INFO L87 Difference]: Start difference. First operand 142 states and 150 transitions. Second operand has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 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) [2022-11-16 19:47:54,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:47:54,136 INFO L93 Difference]: Finished difference Result 218 states and 228 transitions. [2022-11-16 19:47:54,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 19:47:54,141 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 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 99 [2022-11-16 19:47:54,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:47:54,142 INFO L225 Difference]: With dead ends: 218 [2022-11-16 19:47:54,142 INFO L226 Difference]: Without dead ends: 128 [2022-11-16 19:47:54,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=331, Invalid=1001, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 19:47:54,144 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 460 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:47:54,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 417 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-11-16 19:47:54,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-16 19:47:54,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2022-11-16 19:47:54,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0521739130434782) internal successors, (121), 115 states have internal predecessors, (121), 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) [2022-11-16 19:47:54,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2022-11-16 19:47:54,179 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 99 [2022-11-16 19:47:54,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:47:54,179 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2022-11-16 19:47:54,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 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) [2022-11-16 19:47:54,179 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2022-11-16 19:47:54,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-16 19:47:54,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:47:54,180 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:47:54,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-16 19:47:54,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-16 19:47:54,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-16 19:47:54,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:54,781 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:47:54,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:47:54,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1920332381, now seen corresponding path program 11 times [2022-11-16 19:47:54,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:47:54,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002894328] [2022-11-16 19:47:54,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 19:47:54,783 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:47:54,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:47:54,784 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:47:54,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-16 19:47:56,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-16 19:47:56,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:47:56,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-16 19:47:56,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:56,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:47:56,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2022-11-16 19:47:56,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:56,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:47:56,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:56,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:56,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:56,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-16 19:47:56,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:56,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:47:56,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:56,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:56,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:56,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-16 19:47:56,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:47:56,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-11-16 19:47:56,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:56,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:47:57,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:57,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:57,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:57,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-16 19:47:57,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:57,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:47:57,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:57,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:57,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:57,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-16 19:47:57,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:47:57,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-11-16 19:47:57,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:57,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:47:57,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:57,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:57,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:57,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-16 19:47:57,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:57,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 19:47:57,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:57,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:57,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:47:57,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-16 19:47:57,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 19:47:57,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-11-16 19:47:59,145 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:47:59,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 20 [2022-11-16 19:47:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:47:59,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:48:15,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 19:48:15,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 19:48:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 36 proven. 220 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 19:48:15,936 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:48:15,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002894328] [2022-11-16 19:48:15,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002894328] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:48:15,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [354939026] [2022-11-16 19:48:15,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 19:48:15,937 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:48:15,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:48:15,938 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:48:15,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0788a0-5e06-4b6c-baef-caa5bac10417/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process