./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/pcompf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/pcompf.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl --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 f995d1a14a0e61f10b2f5817b1ff2bf8d1511dbe7297ad48450a11ed6f3a9160 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:16:07,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:16:07,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:16:07,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:16:07,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:16:07,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:16:07,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:16:07,233 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:16:07,237 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:16:07,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:16:07,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:16:07,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:16:07,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:16:07,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:16:07,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:16:07,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:16:07,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:16:07,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:16:07,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:16:07,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:16:07,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:16:07,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:16:07,287 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:16:07,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:16:07,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:16:07,299 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:16:07,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:16:07,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:16:07,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:16:07,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:16:07,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:16:07,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:16:07,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:16:07,305 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:16:07,306 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:16:07,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:16:07,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:16:07,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:16:07,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:16:07,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:16:07,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:16:07,310 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:16:07,336 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:16:07,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:16:07,337 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:16:07,337 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:16:07,338 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:16:07,338 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:16:07,338 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:16:07,338 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:16:07,339 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:16:07,339 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:16:07,339 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:16:07,339 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:16:07,339 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:16:07,340 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:16:07,340 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:16:07,340 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:16:07,340 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:16:07,340 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:16:07,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:16:07,341 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:16:07,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:16:07,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:16:07,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:16:07,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:16:07,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:16:07,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:16:07,343 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:16:07,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:16:07,343 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:16:07,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:16:07,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:16:07,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:16:07,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:16:07,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:16:07,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:16:07,345 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:16:07,345 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:16:07,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:16:07,345 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:16:07,346 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:16:07,346 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:16:07,346 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f995d1a14a0e61f10b2f5817b1ff2bf8d1511dbe7297ad48450a11ed6f3a9160 [2021-11-23 17:16:07,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:16:07,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:16:07,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:16:07,646 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:16:07,647 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:16:07,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-fpi/pcompf.c [2021-11-23 17:16:07,734 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/data/cda4fcc7b/d95c68b638244dc38ba831f29eaf5285/FLAGb28b7dd3f [2021-11-23 17:16:08,188 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:16:08,188 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/sv-benchmarks/c/array-fpi/pcompf.c [2021-11-23 17:16:08,194 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/data/cda4fcc7b/d95c68b638244dc38ba831f29eaf5285/FLAGb28b7dd3f [2021-11-23 17:16:08,542 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/data/cda4fcc7b/d95c68b638244dc38ba831f29eaf5285 [2021-11-23 17:16:08,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:16:08,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:16:08,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:16:08,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:16:08,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:16:08,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:16:08" (1/1) ... [2021-11-23 17:16:08,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a16be54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:08, skipping insertion in model container [2021-11-23 17:16:08,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:16:08" (1/1) ... [2021-11-23 17:16:08,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:16:08,580 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:16:08,820 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/sv-benchmarks/c/array-fpi/pcompf.c[589,602] [2021-11-23 17:16:08,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:16:08,849 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:16:08,861 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/sv-benchmarks/c/array-fpi/pcompf.c[589,602] [2021-11-23 17:16:08,870 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:16:08,883 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:16:08,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:08 WrapperNode [2021-11-23 17:16:08,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:16:08,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:16:08,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:16:08,885 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:16:08,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:08" (1/1) ... [2021-11-23 17:16:08,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:08" (1/1) ... [2021-11-23 17:16:08,941 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2021-11-23 17:16:08,942 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:16:08,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:16:08,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:16:08,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:16:08,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:08" (1/1) ... [2021-11-23 17:16:08,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:08" (1/1) ... [2021-11-23 17:16:08,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:08" (1/1) ... [2021-11-23 17:16:08,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:08" (1/1) ... [2021-11-23 17:16:08,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:08" (1/1) ... [2021-11-23 17:16:08,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:08" (1/1) ... [2021-11-23 17:16:08,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:08" (1/1) ... [2021-11-23 17:16:08,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:16:09,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:16:09,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:16:09,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:16:09,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:08" (1/1) ... [2021-11-23 17:16:09,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:16:09,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:09,037 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:16:09,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:16:09,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:16:09,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:16:09,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 17:16:09,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 17:16:09,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:16:09,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:16:09,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 17:16:09,149 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:16:09,151 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:16:09,313 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:16:09,341 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$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) [2021-11-23 17:16:09,346 INFO L158 Benchmark]: Toolchain (without parser) took 798.41ms. Allocated memory was 88.1MB in the beginning and 123.7MB in the end (delta: 35.7MB). Free memory was 53.1MB in the beginning and 84.3MB in the end (delta: -31.2MB). Peak memory consumption was 3.4MB. Max. memory is 16.1GB. [2021-11-23 17:16:09,347 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 88.1MB. Free memory was 57.9MB in the beginning and 57.9MB in the end (delta: 28.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:16:09,350 INFO L158 Benchmark]: CACSL2BoogieTranslator took 336.44ms. Allocated memory was 88.1MB in the beginning and 123.7MB in the end (delta: 35.7MB). Free memory was 52.9MB in the beginning and 99.6MB in the end (delta: -46.6MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2021-11-23 17:16:09,364 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.44ms. Allocated memory is still 123.7MB. Free memory was 99.6MB in the beginning and 97.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:16:09,366 INFO L158 Benchmark]: Boogie Preprocessor took 57.32ms. Allocated memory is still 123.7MB. Free memory was 97.8MB in the beginning and 96.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:16:09,367 INFO L158 Benchmark]: RCFGBuilder took 342.56ms. Allocated memory is still 123.7MB. Free memory was 96.4MB in the beginning and 84.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 17:16:09,372 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 88.1MB. Free memory was 57.9MB in the beginning and 57.9MB in the end (delta: 28.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 336.44ms. Allocated memory was 88.1MB in the beginning and 123.7MB in the end (delta: 35.7MB). Free memory was 52.9MB in the beginning and 99.6MB in the end (delta: -46.6MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.44ms. Allocated memory is still 123.7MB. Free memory was 99.6MB in the beginning and 97.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 57.32ms. Allocated memory is still 123.7MB. Free memory was 97.8MB in the beginning and 96.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 342.56ms. Allocated memory is still 123.7MB. Free memory was 96.4MB in the beginning and 84.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:16:09,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/pcompf.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl --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 f995d1a14a0e61f10b2f5817b1ff2bf8d1511dbe7297ad48450a11ed6f3a9160 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:16:11,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:16:11,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:16:11,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:16:11,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:16:11,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:16:11,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:16:11,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:16:11,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:16:11,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:16:11,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:16:11,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:16:11,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:16:11,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:16:11,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:16:11,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:16:11,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:16:11,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:16:11,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:16:11,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:16:11,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:16:11,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:16:11,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:16:11,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:16:11,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:16:11,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:16:11,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:16:11,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:16:11,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:16:11,829 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:16:11,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:16:11,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:16:11,831 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:16:11,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:16:11,844 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:16:11,844 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:16:11,845 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:16:11,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:16:11,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:16:11,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:16:11,847 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:16:11,848 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:16:11,875 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:16:11,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:16:11,875 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:16:11,875 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:16:11,876 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:16:11,876 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:16:11,876 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:16:11,877 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:16:11,877 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:16:11,877 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:16:11,877 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:16:11,877 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:16:11,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:16:11,878 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:16:11,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:16:11,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:16:11,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:16:11,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:16:11,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:16:11,879 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:16:11,880 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:16:11,880 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:16:11,880 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:16:11,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:16:11,880 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:16:11,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:16:11,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:16:11,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:16:11,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:16:11,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:16:11,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:16:11,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:16:11,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:16:11,882 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:16:11,882 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:11,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:16:11,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:16:11,883 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:16:11,883 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_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f995d1a14a0e61f10b2f5817b1ff2bf8d1511dbe7297ad48450a11ed6f3a9160 [2021-11-23 17:16:12,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:16:12,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:16:12,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:16:12,259 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:16:12,260 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:16:12,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-fpi/pcompf.c [2021-11-23 17:16:12,344 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/data/0bc5c956a/fda573e6c09d455dae32adb1ad671ef9/FLAG0d84ffb12 [2021-11-23 17:16:12,846 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:16:12,847 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/sv-benchmarks/c/array-fpi/pcompf.c [2021-11-23 17:16:12,853 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/data/0bc5c956a/fda573e6c09d455dae32adb1ad671ef9/FLAG0d84ffb12 [2021-11-23 17:16:13,186 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/data/0bc5c956a/fda573e6c09d455dae32adb1ad671ef9 [2021-11-23 17:16:13,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:16:13,190 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:16:13,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:16:13,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:16:13,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:16:13,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:16:13" (1/1) ... [2021-11-23 17:16:13,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7291fdee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:13, skipping insertion in model container [2021-11-23 17:16:13,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:16:13" (1/1) ... [2021-11-23 17:16:13,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:16:13,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:16:13,370 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/sv-benchmarks/c/array-fpi/pcompf.c[589,602] [2021-11-23 17:16:13,443 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:16:13,478 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:16:13,495 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/sv-benchmarks/c/array-fpi/pcompf.c[589,602] [2021-11-23 17:16:13,523 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:16:13,544 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:16:13,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:13 WrapperNode [2021-11-23 17:16:13,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:16:13,546 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:16:13,547 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:16:13,547 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:16:13,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:13" (1/1) ... [2021-11-23 17:16:13,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:13" (1/1) ... [2021-11-23 17:16:13,610 INFO L137 Inliner]: procedures = 18, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 88 [2021-11-23 17:16:13,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:16:13,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:16:13,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:16:13,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:16:13,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:13" (1/1) ... [2021-11-23 17:16:13,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:13" (1/1) ... [2021-11-23 17:16:13,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:13" (1/1) ... [2021-11-23 17:16:13,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:13" (1/1) ... [2021-11-23 17:16:13,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:13" (1/1) ... [2021-11-23 17:16:13,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:13" (1/1) ... [2021-11-23 17:16:13,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:13" (1/1) ... [2021-11-23 17:16:13,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:16:13,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:16:13,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:16:13,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:16:13,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:13" (1/1) ... [2021-11-23 17:16:13,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:16:13,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:13,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:16:13,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:16:13,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:16:13,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:16:13,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-23 17:16:13,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 17:16:13,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:16:13,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:16:13,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-23 17:16:13,882 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:16:13,884 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:16:14,191 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:16:14,198 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:16:14,199 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 17:16:14,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:16:14 BoogieIcfgContainer [2021-11-23 17:16:14,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:16:14,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:16:14,202 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:16:14,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:16:14,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:16:13" (1/3) ... [2021-11-23 17:16:14,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e642169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:16:14, skipping insertion in model container [2021-11-23 17:16:14,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:13" (2/3) ... [2021-11-23 17:16:14,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e642169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:16:14, skipping insertion in model container [2021-11-23 17:16:14,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:16:14" (3/3) ... [2021-11-23 17:16:14,208 INFO L111 eAbstractionObserver]: Analyzing ICFG pcompf.c [2021-11-23 17:16:14,214 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:16:14,214 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:16:14,279 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:16:14,287 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 17:16:14,288 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:16:14,302 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:14,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 17:16:14,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:14,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:14,310 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:14,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:14,315 INFO L85 PathProgramCache]: Analyzing trace with hash -592971038, now seen corresponding path program 1 times [2021-11-23 17:16:14,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:14,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078374813] [2021-11-23 17:16:14,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:14,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:14,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:14,337 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:14,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:16:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:14,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 17:16:14,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:14,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:14,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:14,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078374813] [2021-11-23 17:16:14,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078374813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:14,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:14,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:16:14,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282802447] [2021-11-23 17:16:14,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:14,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 17:16:14,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:14,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 17:16:14,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:16:14,624 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:14,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:14,640 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2021-11-23 17:16:14,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 17:16:14,643 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 17:16:14,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:14,651 INFO L225 Difference]: With dead ends: 44 [2021-11-23 17:16:14,651 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 17:16:14,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:16:14,659 INFO L933 BasicCegarLoop]: 28 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, 28 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 [2021-11-23 17:16:14,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:16:14,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 17:16:14,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-23 17:16:14,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:14,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-23 17:16:14,693 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2021-11-23 17:16:14,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:14,694 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-23 17:16:14,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:14,695 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-23 17:16:14,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 17:16:14,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:14,696 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:14,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:14,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:14,909 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:14,910 INFO L85 PathProgramCache]: Analyzing trace with hash 108093540, now seen corresponding path program 1 times [2021-11-23 17:16:14,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:14,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774442788] [2021-11-23 17:16:14,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:14,912 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:14,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:14,920 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:14,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:16:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:15,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:16:15,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:15,457 INFO L354 Elim1Store]: treesize reduction 159, result has 28.7 percent of original size [2021-11-23 17:16:15,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 250 treesize of output 203 [2021-11-23 17:16:15,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:15,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:16:15,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:16:15,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:15,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:16:15,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:16:15,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:15,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:16:15,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:16:16,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:16:16,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-11-23 17:16:16,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:16,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:16:17,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:17,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-11-23 17:16:17,273 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 17:16:17,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:16:17,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 60 [2021-11-23 17:16:17,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:17,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:16:17,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:17,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:16:17,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:16:17,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2021-11-23 17:16:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:17,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:17,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:17,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774442788] [2021-11-23 17:16:17,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774442788] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:17,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:17,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:16:17,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796424133] [2021-11-23 17:16:17,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:17,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:16:17,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:17,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:16:17,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:16:17,927 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:18,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:18,341 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-11-23 17:16:18,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:16:18,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 17:16:18,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:18,343 INFO L225 Difference]: With dead ends: 39 [2021-11-23 17:16:18,343 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 17:16:18,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:16:18,345 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:18,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 65 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 17:16:18,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 17:16:18,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2021-11-23 17:16:18,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:18,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-11-23 17:16:18,354 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 14 [2021-11-23 17:16:18,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:18,354 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-11-23 17:16:18,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:18,355 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-11-23 17:16:18,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 17:16:18,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:18,356 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:18,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:18,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:18,568 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:18,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:18,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1850906398, now seen corresponding path program 1 times [2021-11-23 17:16:18,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:18,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743850422] [2021-11-23 17:16:18,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:18,570 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:18,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:18,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:18,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:16:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:18,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:16:18,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:18,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:18,931 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:18,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743850422] [2021-11-23 17:16:18,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743850422] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:18,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:18,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:16:18,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654529908] [2021-11-23 17:16:18,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:18,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:16:18,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:18,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:16:18,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:16:18,934 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:19,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:19,332 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-11-23 17:16:19,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:16:19,337 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 17:16:19,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:19,338 INFO L225 Difference]: With dead ends: 54 [2021-11-23 17:16:19,338 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 17:16:19,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:16:19,340 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 73 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:19,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 23 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:16:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 17:16:19,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2021-11-23 17:16:19,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:19,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-11-23 17:16:19,354 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 16 [2021-11-23 17:16:19,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:19,354 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-11-23 17:16:19,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-11-23 17:16:19,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 17:16:19,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:19,356 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:19,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:19,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:19,568 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:19,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:19,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1060218526, now seen corresponding path program 1 times [2021-11-23 17:16:19,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:19,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435574410] [2021-11-23 17:16:19,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:19,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:19,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:19,570 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:19,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:16:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:19,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:16:19,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:19,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:20,073 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:20,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435574410] [2021-11-23 17:16:20,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435574410] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:20,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [777833396] [2021-11-23 17:16:20,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:20,073 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:20,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:20,076 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:20,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-23 17:16:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:20,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:16:20,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:20,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:20,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [777833396] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:20,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707220242] [2021-11-23 17:16:20,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:20,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:20,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:20,477 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:20,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 17:16:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:20,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:16:20,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:20,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:20,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707220242] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:16:20,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-23 17:16:20,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 7, 8, 7, 6] total 19 [2021-11-23 17:16:20,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592849175] [2021-11-23 17:16:20,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:20,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:16:20,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:20,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:16:20,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:16:20,723 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:20,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:20,963 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-11-23 17:16:20,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:16:20,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 17:16:20,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:20,965 INFO L225 Difference]: With dead ends: 46 [2021-11-23 17:16:20,965 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 17:16:20,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:16:20,967 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 25 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:20,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 34 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:16:20,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 17:16:20,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-11-23 17:16:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:20,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-23 17:16:20,980 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 16 [2021-11-23 17:16:20,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:20,980 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-23 17:16:20,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:20,981 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-23 17:16:20,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 17:16:20,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:20,982 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:20,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:21,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:21,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:21,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:21,585 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:21,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:21,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1120615462, now seen corresponding path program 1 times [2021-11-23 17:16:21,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:21,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489168814] [2021-11-23 17:16:21,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:21,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:21,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:21,587 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:21,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:16:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:21,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:16:21,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:21,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:21,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:22,008 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:22,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489168814] [2021-11-23 17:16:22,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489168814] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:22,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1675979811] [2021-11-23 17:16:22,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:22,009 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:22,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:22,011 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:22,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 17:16:22,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:22,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:16:22,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:22,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:22,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1675979811] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:22,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913434491] [2021-11-23 17:16:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:22,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:22,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:22,384 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:22,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 17:16:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:22,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:16:22,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:22,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:22,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:22,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913434491] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:22,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:16:22,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7, 6, 7, 6] total 14 [2021-11-23 17:16:22,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080564393] [2021-11-23 17:16:22,623 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:16:22,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 17:16:22,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:22,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 17:16:22,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:16:22,625 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:23,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:23,247 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-11-23 17:16:23,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:16:23,249 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 17:16:23,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:23,250 INFO L225 Difference]: With dead ends: 43 [2021-11-23 17:16:23,250 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 17:16:23,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:16:23,252 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 62 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:23,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 44 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 17:16:23,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 17:16:23,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-11-23 17:16:23,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:23,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-23 17:16:23,257 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2021-11-23 17:16:23,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:23,257 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-23 17:16:23,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:23,258 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-23 17:16:23,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 17:16:23,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:23,259 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:23,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:23,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:23,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:23,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:23,865 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:23,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:23,865 INFO L85 PathProgramCache]: Analyzing trace with hash 615941150, now seen corresponding path program 1 times [2021-11-23 17:16:23,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:23,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456096715] [2021-11-23 17:16:23,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:23,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:23,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:23,867 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:23,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:16:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:24,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 17:16:24,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:24,369 INFO L354 Elim1Store]: treesize reduction 159, result has 28.7 percent of original size [2021-11-23 17:16:24,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 250 treesize of output 203 [2021-11-23 17:16:24,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:24,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:16:24,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:16:24,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:24,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:16:24,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:16:24,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:24,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:16:24,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:16:24,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-11-23 17:16:24,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-11-23 17:16:24,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:24,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-11-23 17:16:24,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:24,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 17:16:24,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:24,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-11-23 17:16:24,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:24,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-11-23 17:16:25,130 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:16:25,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2021-11-23 17:16:25,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:25,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:16:25,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:16:25,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-11-23 17:16:25,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:25,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:16:25,352 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 17:16:25,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 70 [2021-11-23 17:16:25,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 17:16:25,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 118 [2021-11-23 17:16:25,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 17:16:25,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 17:16:25,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:25,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:25,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:25,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:25,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:25,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:25,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:16:25,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:16:25,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:16:25,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2021-11-23 17:16:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:25,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:26,115 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_340 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ sign_extend 32) (_ bv0 32)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_340) |c_ULTIMATE.start_main_~c~0#1.base|))) (concat (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|))))) is different from false [2021-11-23 17:16:26,147 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_340 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_339 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ sign_extend 32) (_ bv0 32)) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_339) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_340) |c_ULTIMATE.start_main_~c~0#1.base|))) (concat (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|))))) is different from false [2021-11-23 17:16:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-23 17:16:26,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:26,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456096715] [2021-11-23 17:16:26,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456096715] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:26,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [64797610] [2021-11-23 17:16:26,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:26,193 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:26,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:26,194 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:26,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 17:16:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:26,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:16:26,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:26,815 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:16:26,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 123 [2021-11-23 17:16:26,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:26,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:26,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-11-23 17:16:26,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:26,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:16:26,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:16:26,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2021-11-23 17:16:27,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 17:16:27,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:27,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:27,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:27,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:27,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:27,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:27,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:16:27,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:16:27,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:16:27,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2021-11-23 17:16:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:27,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:27,389 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_394 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ sign_extend 32) (_ bv0 32)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_394) |c_ULTIMATE.start_main_~c~0#1.base|))) (concat (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|))))) is different from false [2021-11-23 17:16:27,427 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_394 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_393 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ sign_extend 32) (_ bv0 32)) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_393) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_394) |c_ULTIMATE.start_main_~c~0#1.base|))) (concat (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|))))) is different from false [2021-11-23 17:16:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-23 17:16:27,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [64797610] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:27,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896556595] [2021-11-23 17:16:27,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:27,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:27,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:27,467 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:27,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 17:16:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:27,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 17:16:27,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:27,830 INFO L354 Elim1Store]: treesize reduction 159, result has 28.7 percent of original size [2021-11-23 17:16:27,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 120 treesize of output 151 [2021-11-23 17:16:27,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:27,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:16:27,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:16:27,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:27,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:16:27,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:16:27,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:27,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:16:27,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:16:28,025 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-11-23 17:16:28,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 41 [2021-11-23 17:16:28,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:28,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-11-23 17:16:28,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:28,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-11-23 17:16:28,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:28,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 17:16:28,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:16:28,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-11-23 17:16:28,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:28,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:16:28,489 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:16:28,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 56 [2021-11-23 17:16:28,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:28,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:16:28,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-11-23 17:16:28,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:28,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:16:28,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2021-11-23 17:16:28,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 17:16:28,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 17:16:28,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:28,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:28,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:28,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:28,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:28,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:28,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:16:28,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:16:28,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:16:28,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2021-11-23 17:16:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:28,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:29,178 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_448 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ sign_extend 32) (_ bv0 32)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_448) |c_ULTIMATE.start_main_~c~0#1.base|))) (concat (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|))))) is different from false [2021-11-23 17:16:29,211 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_447 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_448 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_447) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_448) |c_ULTIMATE.start_main_~c~0#1.base|))) (concat (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|))) ((_ sign_extend 32) (_ bv0 32)))) is different from false [2021-11-23 17:16:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-23 17:16:29,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896556595] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:29,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:16:29,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 8] total 20 [2021-11-23 17:16:29,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902505670] [2021-11-23 17:16:29,249 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:16:29,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 17:16:29,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:29,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 17:16:29,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=145, Unknown=6, NotChecked=174, Total=380 [2021-11-23 17:16:29,250 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:29,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:29,995 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-11-23 17:16:29,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 17:16:29,997 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 17:16:29,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:29,999 INFO L225 Difference]: With dead ends: 53 [2021-11-23 17:16:29,999 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 17:16:29,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=104, Invalid=293, Unknown=7, NotChecked=246, Total=650 [2021-11-23 17:16:30,000 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:30,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 165 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 91 Invalid, 0 Unknown, 170 Unchecked, 0.4s Time] [2021-11-23 17:16:30,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 17:16:30,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2021-11-23 17:16:30,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:30,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-11-23 17:16:30,008 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 20 [2021-11-23 17:16:30,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:30,009 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-11-23 17:16:30,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:30,009 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-11-23 17:16:30,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 17:16:30,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:30,010 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:30,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:30,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:30,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-23 17:16:30,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:30,620 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:30,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:30,621 INFO L85 PathProgramCache]: Analyzing trace with hash 859342364, now seen corresponding path program 2 times [2021-11-23 17:16:30,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:30,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347838360] [2021-11-23 17:16:30,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:16:30,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:30,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:30,622 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:30,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:16:30,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:16:30,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:30,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:16:30,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:31,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:16:31,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:16:31,224 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:31,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347838360] [2021-11-23 17:16:31,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347838360] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:31,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [435974902] [2021-11-23 17:16:31,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:16:31,225 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:31,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:31,226 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:31,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 17:16:31,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:16:31,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:31,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:16:31,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:16:31,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:31,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:16:31,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [435974902] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:31,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762721874] [2021-11-23 17:16:31,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:16:31,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:31,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:31,702 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:31,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 17:16:31,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:16:31,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:31,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:16:31,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:16:32,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:16:32,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762721874] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:32,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:16:32,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10, 8, 9, 8] total 20 [2021-11-23 17:16:32,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292185959] [2021-11-23 17:16:32,122 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:16:32,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 17:16:32,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:32,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 17:16:32,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:16:32,124 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:33,113 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-11-23 17:16:33,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 17:16:33,115 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 17:16:33,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:33,115 INFO L225 Difference]: With dead ends: 74 [2021-11-23 17:16:33,115 INFO L226 Difference]: Without dead ends: 61 [2021-11-23 17:16:33,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2021-11-23 17:16:33,117 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 130 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:33,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 57 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 17:16:33,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-23 17:16:33,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2021-11-23 17:16:33,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 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) [2021-11-23 17:16:33,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-11-23 17:16:33,128 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 22 [2021-11-23 17:16:33,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:33,128 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-11-23 17:16:33,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:33,129 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-11-23 17:16:33,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 17:16:33,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:33,130 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:33,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:33,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:33,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-23 17:16:33,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:33,732 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:33,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:33,733 INFO L85 PathProgramCache]: Analyzing trace with hash 803751580, now seen corresponding path program 3 times [2021-11-23 17:16:33,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:33,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161263605] [2021-11-23 17:16:33,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:16:33,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:33,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:33,735 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:33,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:16:33,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 17:16:33,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:33,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:16:33,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:16:34,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:16:34,509 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:34,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161263605] [2021-11-23 17:16:34,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161263605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:34,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1907188337] [2021-11-23 17:16:34,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:16:34,509 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:34,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:34,510 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:34,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 17:16:34,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 17:16:34,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:34,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:16:34,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:16:35,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:16:35,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1907188337] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:35,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578409328] [2021-11-23 17:16:35,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:16:35,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:35,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:35,320 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:35,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 17:16:35,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 17:16:35,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:35,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:16:35,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:16:35,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:35,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578409328] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:35,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:16:35,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10, 8, 9, 10] total 31 [2021-11-23 17:16:35,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607695491] [2021-11-23 17:16:35,795 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:16:35,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 17:16:35,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:35,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 17:16:35,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=666, Unknown=0, NotChecked=0, Total=930 [2021-11-23 17:16:35,798 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:37,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:37,486 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2021-11-23 17:16:37,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 17:16:37,487 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 17:16:37,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:37,488 INFO L225 Difference]: With dead ends: 108 [2021-11-23 17:16:37,489 INFO L226 Difference]: Without dead ends: 91 [2021-11-23 17:16:37,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=640, Invalid=1810, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 17:16:37,491 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 301 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:37,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 88 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 17:16:37,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-23 17:16:37,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 56. [2021-11-23 17:16:37,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:37,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-11-23 17:16:37,503 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 22 [2021-11-23 17:16:37,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:37,503 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-11-23 17:16:37,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:37,503 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-11-23 17:16:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 17:16:37,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:37,505 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:37,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:37,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:37,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:38,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:38,132 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:38,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:38,133 INFO L85 PathProgramCache]: Analyzing trace with hash 678263444, now seen corresponding path program 1 times [2021-11-23 17:16:38,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:38,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760373487] [2021-11-23 17:16:38,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:38,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:38,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:38,134 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:38,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:16:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:38,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 17:16:38,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:38,368 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:16:38,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 65 [2021-11-23 17:16:38,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:38,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:38,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:38,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:38,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:38,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:16:38,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2021-11-23 17:16:38,439 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:16:38,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 46 [2021-11-23 17:16:38,591 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 17:16:38,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 42 [2021-11-23 17:16:38,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 17:16:38,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:38,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:38,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:38,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:38,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:38,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:38,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2021-11-23 17:16:38,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:38,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:38,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:38,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:38,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:38,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:38,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 69 [2021-11-23 17:16:39,439 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 17:16:39,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 119 treesize of output 59 [2021-11-23 17:16:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:39,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:42,174 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_767 (_ BitVec 32)) (v_ArrVal_766 (_ BitVec 32)) (v_ArrVal_765 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_765))) (let ((.cse6 (store (store (select .cse7 |c_ULTIMATE.start_main_~b~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_767) (bvadd |c_ULTIMATE.start_main_~b~0#1.offset| (_ bv12 32)) v_ArrVal_766))) (let ((.cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (.cse4 (select (store .cse7 |c_ULTIMATE.start_main_~b~0#1.base| .cse6) |c_ULTIMATE.start_main_~c~0#1.base|))) (let ((.cse5 (bvadd (concat (select .cse4 .cse3) (select .cse4 |c_ULTIMATE.start_main_~c~0#1.offset|)) (concat (select .cse6 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse6 |c_ULTIMATE.start_main_~b~0#1.offset|))))) (let ((.cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (.cse0 ((_ extract 63 32) .cse5))) (let ((.cse1 (store (store .cse4 .cse2 ((_ extract 31 0) .cse5)) (bvadd |c_ULTIMATE.start_main_~c~0#1.offset| (_ bv12 32)) .cse0))) (or (= (concat .cse0 (select .cse1 .cse2)) ((_ sign_extend 32) (_ bv1 32))) (not (= (concat (select .cse1 .cse3) (select .cse1 |c_ULTIMATE.start_main_~c~0#1.offset|)) ((_ sign_extend 32) (_ bv0 32)))))))))))) is different from false [2021-11-23 17:16:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-23 17:16:42,233 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:42,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760373487] [2021-11-23 17:16:42,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760373487] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:42,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [95863656] [2021-11-23 17:16:42,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:42,234 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:42,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:42,240 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:42,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 17:16:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:43,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 17:16:43,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:43,145 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:16:43,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 151 treesize of output 145 [2021-11-23 17:16:43,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 36 treesize of output 36 [2021-11-23 17:16:43,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:16:43,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:16:43,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:16:43,510 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:16:43,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 40 [2021-11-23 17:16:43,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:16:43,851 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 17:16:43,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 63 [2021-11-23 17:16:43,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:43,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:16:43,971 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 17:16:43,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 99 treesize of output 75 [2021-11-23 17:16:44,609 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 17:16:44,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 119 treesize of output 59 [2021-11-23 17:16:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:44,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:49,703 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_827 (_ BitVec 32)) (v_ArrVal_825 (_ BitVec 32)) (v_ArrVal_824 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ sign_extend 32) (_ bv1 32)) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_824))) (let ((.cse4 (store (store (select .cse5 |c_ULTIMATE.start_main_~b~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_825) (bvadd |c_ULTIMATE.start_main_~b~0#1.offset| (_ bv12 32)) v_ArrVal_827))) (let ((.cse1 (select (store .cse5 |c_ULTIMATE.start_main_~b~0#1.base| .cse4) |c_ULTIMATE.start_main_~c~0#1.base|))) (let ((.cse3 (bvadd (concat (select .cse4 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse4 |c_ULTIMATE.start_main_~b~0#1.offset|)) (concat (select .cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (select .cse1 |c_ULTIMATE.start_main_~c~0#1.offset|))))) (let ((.cse0 ((_ extract 63 32) .cse3))) (concat .cse0 (let ((.cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~c~0#1.offset|))) (select (store (store .cse1 .cse2 ((_ extract 31 0) .cse3)) (bvadd |c_ULTIMATE.start_main_~c~0#1.offset| (_ bv12 32)) .cse0) .cse2)))))))))) is different from false [2021-11-23 17:16:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-23 17:16:49,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [95863656] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:49,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156546667] [2021-11-23 17:16:49,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:49,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:49,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:49,765 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:49,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 17:16:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:49,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 17:16:49,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:50,034 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:16:50,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 73 [2021-11-23 17:16:50,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:50,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:50,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 49 [2021-11-23 17:16:50,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 52 [2021-11-23 17:16:50,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 49 [2021-11-23 17:16:50,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:50,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2021-11-23 17:16:50,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:50,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:50,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:16:50,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:50,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 17 [2021-11-23 17:16:50,423 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 17:16:50,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 49 [2021-11-23 17:16:50,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:50,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:50,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:50,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:50,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:50,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:50,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 53 [2021-11-23 17:16:50,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:50,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:50,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:50,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:50,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:50,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:50,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2021-11-23 17:16:52,634 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 17:16:52,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 119 treesize of output 59 [2021-11-23 17:16:52,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:52,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:53,504 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_767 (_ BitVec 32)) (v_ArrVal_766 (_ BitVec 32)) (v_ArrVal_892 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_892))) (let ((.cse6 (store (store (select .cse7 |c_ULTIMATE.start_main_~b~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_767) (bvadd |c_ULTIMATE.start_main_~b~0#1.offset| (_ bv12 32)) v_ArrVal_766))) (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (.cse4 (select (store .cse7 |c_ULTIMATE.start_main_~b~0#1.base| .cse6) |c_ULTIMATE.start_main_~c~0#1.base|))) (let ((.cse5 (bvadd (concat (select .cse4 .cse1) (select .cse4 |c_ULTIMATE.start_main_~c~0#1.offset|)) (concat (select .cse6 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse6 |c_ULTIMATE.start_main_~b~0#1.offset|))))) (let ((.cse3 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (.cse2 ((_ extract 63 32) .cse5))) (let ((.cse0 (store (store .cse4 .cse3 ((_ extract 31 0) .cse5)) (bvadd |c_ULTIMATE.start_main_~c~0#1.offset| (_ bv12 32)) .cse2))) (or (not (= ((_ sign_extend 32) (_ bv0 32)) (concat (select .cse0 .cse1) (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|)))) (= ((_ sign_extend 32) (_ bv1 32)) (concat .cse2 (select .cse0 .cse3))))))))))) is different from false [2021-11-23 17:16:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-23 17:16:53,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156546667] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:53,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:16:53,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 9, 11, 12, 13] total 40 [2021-11-23 17:16:53,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711030895] [2021-11-23 17:16:53,543 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:16:53,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-23 17:16:53,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:53,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-23 17:16:53,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1152, Unknown=4, NotChecked=216, Total=1560 [2021-11-23 17:16:53,546 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 40 states, 40 states have (on average 2.3) internal successors, (92), 40 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:55,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:55,752 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-11-23 17:16:55,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 17:16:55,752 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 40 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-23 17:16:55,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:55,753 INFO L225 Difference]: With dead ends: 62 [2021-11-23 17:16:55,753 INFO L226 Difference]: Without dead ends: 60 [2021-11-23 17:16:55,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=292, Invalid=1438, Unknown=4, NotChecked=246, Total=1980 [2021-11-23 17:16:55,755 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:55,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 192 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 125 Invalid, 0 Unknown, 124 Unchecked, 0.8s Time] [2021-11-23 17:16:55,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-23 17:16:55,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-23 17:16:55,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 59 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-11-23 17:16:55,779 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 24 [2021-11-23 17:16:55,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:55,780 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-11-23 17:16:55,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 40 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:55,780 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-11-23 17:16:55,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 17:16:55,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:55,781 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:55,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:55,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:56,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:56,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:56,382 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:56,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:56,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1304966232, now seen corresponding path program 4 times [2021-11-23 17:16:56,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:56,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111579065] [2021-11-23 17:16:56,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:16:56,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:56,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:56,385 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:56,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 17:16:56,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:16:56,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:56,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 17:16:56,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:56,705 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:16:56,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 75 [2021-11-23 17:16:56,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:56,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:56,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 26 [2021-11-23 17:16:56,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:56,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:16:56,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:16:56,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2021-11-23 17:16:56,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2021-11-23 17:16:56,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 17:16:56,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 25 [2021-11-23 17:16:57,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:57,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:57,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:57,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:57,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:57,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:57,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:16:57,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 48 [2021-11-23 17:16:57,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:57,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:57,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:57,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:57,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:57,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:57,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:16:57,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:16:57,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:16:57,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2021-11-23 17:16:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:16:57,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:57,999 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_960 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ sign_extend 32) (_ bv0 32)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_960) |c_ULTIMATE.start_main_~c~0#1.base|))) (concat (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|))))) is different from false [2021-11-23 17:16:58,057 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_960 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_958 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ sign_extend 32) (_ bv0 32)) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_958) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_960) |c_ULTIMATE.start_main_~c~0#1.base|))) (concat (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|))))) is different from false [2021-11-23 17:16:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2021-11-23 17:16:58,104 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:58,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111579065] [2021-11-23 17:16:58,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111579065] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:58,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1226143449] [2021-11-23 17:16:58,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:16:58,105 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:58,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:58,106 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:58,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-23 17:16:59,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:16:59,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:59,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 17:16:59,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:59,645 INFO L354 Elim1Store]: treesize reduction 159, result has 28.7 percent of original size [2021-11-23 17:16:59,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 250 treesize of output 203 [2021-11-23 17:16:59,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:59,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:16:59,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:16:59,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:59,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:16:59,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:16:59,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:59,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:16:59,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:16:59,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:16:59,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-11-23 17:16:59,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 17:17:00,027 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:17:00,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2021-11-23 17:17:00,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:00,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:17:00,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:00,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-11-23 17:17:00,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:00,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-11-23 17:17:00,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:00,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:17:00,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:17:00,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-11-23 17:17:00,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:00,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:17:00,323 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:17:00,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 58 [2021-11-23 17:17:00,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:00,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:17:00,427 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-11-23 17:17:00,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2021-11-23 17:17:00,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:00,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:17:00,481 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:17:00,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 123 [2021-11-23 17:17:00,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2021-11-23 17:17:00,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2021-11-23 17:17:00,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 17:17:00,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 17:17:00,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:00,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:00,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:00,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:00,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:00,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:00,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:17:00,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 48 [2021-11-23 17:17:00,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:00,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:00,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:00,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:00,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:00,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:00,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:17:00,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:17:00,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:17:00,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2021-11-23 17:17:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:17:00,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:01,242 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1028 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ sign_extend 32) (_ bv0 32)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_1028) |c_ULTIMATE.start_main_~c~0#1.base|))) (concat (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|))))) is different from false [2021-11-23 17:17:01,277 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1028 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1026 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ sign_extend 32) (_ bv0 32)) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_1026) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_1028) |c_ULTIMATE.start_main_~c~0#1.base|))) (concat (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|))))) is different from false [2021-11-23 17:17:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2021-11-23 17:17:01,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1226143449] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:01,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222886028] [2021-11-23 17:17:01,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:17:01,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:17:01,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:17:01,336 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:17:01,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 17:17:01,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:17:01,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:17:01,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 17:17:01,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:01,728 INFO L354 Elim1Store]: treesize reduction 159, result has 28.7 percent of original size [2021-11-23 17:17:01,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 250 treesize of output 203 [2021-11-23 17:17:01,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:01,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:17:01,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:17:01,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:01,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:17:01,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:17:01,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:01,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:17:01,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:17:01,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:01,950 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:17:01,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2021-11-23 17:17:01,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:01,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-11-23 17:17:02,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:17:02,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-11-23 17:17:02,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:02,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-11-23 17:17:02,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-11-23 17:17:02,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:02,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:17:02,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:17:02,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-23 17:17:02,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:02,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:17:02,439 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-11-23 17:17:02,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 78 [2021-11-23 17:17:02,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:02,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:17:02,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 102 [2021-11-23 17:17:02,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 17:17:02,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 17:17:02,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 17:17:02,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 17:17:02,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:02,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:02,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:02,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:02,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:02,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:02,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:17:02,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 48 [2021-11-23 17:17:02,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:02,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:02,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:02,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:02,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:02,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:02,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:17:02,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:17:02,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:17:02,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2021-11-23 17:17:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:17:02,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:03,295 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1096 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ sign_extend 32) (_ bv0 32)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_1096) |c_ULTIMATE.start_main_~c~0#1.base|))) (concat (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|))))) is different from false [2021-11-23 17:17:03,324 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1096 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1094 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ sign_extend 32) (_ bv0 32)) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_1094) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_1096) |c_ULTIMATE.start_main_~c~0#1.base|))) (concat (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|))))) is different from false [2021-11-23 17:17:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2021-11-23 17:17:03,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222886028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:03,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:17:03,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10, 10, 11, 10] total 25 [2021-11-23 17:17:03,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994760766] [2021-11-23 17:17:03,358 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:17:03,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 17:17:03,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:03,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 17:17:03,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=265, Unknown=6, NotChecked=234, Total=600 [2021-11-23 17:17:03,359 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 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) [2021-11-23 17:17:05,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:05,305 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2021-11-23 17:17:05,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 17:17:05,307 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 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 26 [2021-11-23 17:17:05,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:05,309 INFO L225 Difference]: With dead ends: 104 [2021-11-23 17:17:05,309 INFO L226 Difference]: Without dead ends: 102 [2021-11-23 17:17:05,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 121 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=300, Invalid=978, Unknown=6, NotChecked=438, Total=1722 [2021-11-23 17:17:05,310 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 96 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:05,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 122 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 155 Invalid, 0 Unknown, 351 Unchecked, 0.7s Time] [2021-11-23 17:17:05,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-23 17:17:05,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2021-11-23 17:17:05,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:05,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-11-23 17:17:05,325 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 26 [2021-11-23 17:17:05,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:05,325 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-11-23 17:17:05,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 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) [2021-11-23 17:17:05,326 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-11-23 17:17:05,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 17:17:05,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:05,327 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:05,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:05,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:05,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:05,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:17:05,940 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:05,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:05,941 INFO L85 PathProgramCache]: Analyzing trace with hash -231193078, now seen corresponding path program 2 times [2021-11-23 17:17:05,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:05,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467568074] [2021-11-23 17:17:05,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:17:05,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:05,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:05,942 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:05,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 17:17:06,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:17:06,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:17:06,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:17:06,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:17:06,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:17:06,603 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:06,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467568074] [2021-11-23 17:17:06,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467568074] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:06,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [960799026] [2021-11-23 17:17:06,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:17:06,603 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:17:06,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:17:06,604 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:17:06,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-23 17:17:06,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:17:06,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:17:06,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:17:06,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:07,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:17:07,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:17:07,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [960799026] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:07,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013488213] [2021-11-23 17:17:07,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:17:07,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:17:07,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:17:07,105 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:17:07,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-23 17:17:07,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:17:07,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:17:07,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:17:07,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:17:07,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:17:07,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013488213] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:07,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:17:07,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 9, 10, 9] total 22 [2021-11-23 17:17:07,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513623807] [2021-11-23 17:17:07,591 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:17:07,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 17:17:07,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:07,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 17:17:07,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-11-23 17:17:07,593 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:08,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:08,845 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-11-23 17:17:08,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 17:17:08,848 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-23 17:17:08,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:08,849 INFO L225 Difference]: With dead ends: 83 [2021-11-23 17:17:08,849 INFO L226 Difference]: Without dead ends: 59 [2021-11-23 17:17:08,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-11-23 17:17:08,851 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 119 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:08,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 83 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 17:17:08,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-23 17:17:08,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2021-11-23 17:17:08,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:08,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-11-23 17:17:08,865 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 28 [2021-11-23 17:17:08,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:08,866 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-11-23 17:17:08,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:08,866 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-11-23 17:17:08,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 17:17:08,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:08,867 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:08,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:09,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:09,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-23 17:17:09,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:09,493 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:09,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:09,493 INFO L85 PathProgramCache]: Analyzing trace with hash 341343694, now seen corresponding path program 3 times [2021-11-23 17:17:09,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:09,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900281395] [2021-11-23 17:17:09,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:17:09,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:09,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:09,496 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:09,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 17:17:09,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 17:17:09,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:17:09,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-23 17:17:09,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:09,888 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:17:09,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 129 [2021-11-23 17:17:09,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 41 [2021-11-23 17:17:09,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-11-23 17:17:09,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:09,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:09,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:17:10,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2021-11-23 17:17:10,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2021-11-23 17:17:10,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 48 [2021-11-23 17:17:10,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:17:10,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:17:10,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:17:10,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 92 [2021-11-23 17:17:10,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:10,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 97 [2021-11-23 17:17:11,192 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 17:17:11,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 123 treesize of output 63 [2021-11-23 17:17:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:17:11,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:17,707 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1289 (_ BitVec 32)) (v_ArrVal_1300 (_ BitVec 32)) (v_ArrVal_1288 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1290 (_ BitVec 32)) (v_ArrVal_1293 (_ BitVec 32)) (v_ArrVal_1294 (_ BitVec 32)) (v_ArrVal_1299 (_ BitVec 32))) (let ((.cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (.cse1 (bvadd |c_ULTIMATE.start_main_~c~0#1.offset| (_ bv12 32))) (.cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|))) (let ((.cse0 (store (store (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_1288))) (let ((.cse6 (store (store (store (store (select .cse7 |c_ULTIMATE.start_main_~b~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_1290) (bvadd |c_ULTIMATE.start_main_~b~0#1.offset| (_ bv12 32)) v_ArrVal_1289) (bvadd (_ bv16 32) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_1293) (bvadd |c_ULTIMATE.start_main_~b~0#1.offset| (_ bv20 32)) v_ArrVal_1294))) (let ((.cse4 (select (store .cse7 |c_ULTIMATE.start_main_~b~0#1.base| .cse6) |c_ULTIMATE.start_main_~c~0#1.base|))) (let ((.cse5 (bvadd (concat (select .cse6 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse6 |c_ULTIMATE.start_main_~b~0#1.offset|)) (concat (select .cse4 .cse3) (select .cse4 |c_ULTIMATE.start_main_~c~0#1.offset|))))) (store (store .cse4 .cse2 ((_ extract 31 0) .cse5)) .cse1 ((_ extract 63 32) .cse5)))))) (bvadd (_ bv16 32) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_1300) (bvadd |c_ULTIMATE.start_main_~c~0#1.offset| (_ bv20 32)) v_ArrVal_1299))) (or (= ((_ sign_extend 32) (_ bv1 32)) (concat (select .cse0 .cse1) (select .cse0 .cse2))) (not (= ((_ sign_extend 32) (_ bv0 32)) (concat (select .cse0 .cse3) (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|)))))))) is different from false [2021-11-23 17:17:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2021-11-23 17:17:17,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:17,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900281395] [2021-11-23 17:17:17,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900281395] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:17,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1147343461] [2021-11-23 17:17:17,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:17:17,822 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:17:17,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:17:17,823 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:17:17,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-23 17:17:18,134 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 17:17:18,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996225481] [2021-11-23 17:17:18,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:17:18,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:17:18,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:17:18,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 1 [2021-11-23 17:17:18,136 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:17:18,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-23 17:17:18,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 17:17:18,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:17:18,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 17:17:18,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:19,084 INFO L354 Elim1Store]: treesize reduction 90, result has 39.6 percent of original size [2021-11-23 17:17:19,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 85 [2021-11-23 17:17:19,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:19,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 17:17:19,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:19,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 17:17:19,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:19,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-11-23 17:17:19,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:19,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-11-23 17:17:19,298 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-11-23 17:17:19,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 36 [2021-11-23 17:17:19,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:19,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-11-23 17:17:19,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:17:19,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-11-23 17:17:19,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:19,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-11-23 17:17:19,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-23 17:17:19,539 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:17:19,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 69 [2021-11-23 17:17:19,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:17:19,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:17:20,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 48 [2021-11-23 17:17:20,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:17:20,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:17:20,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:17:20,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 92 [2021-11-23 17:17:20,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:17:20,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 97 [2021-11-23 17:17:20,866 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 17:17:20,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 123 treesize of output 63 [2021-11-23 17:17:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:20,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:24,030 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1289 (_ BitVec 32)) (v_ArrVal_1300 (_ BitVec 32)) (v_ArrVal_1407 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1290 (_ BitVec 32)) (v_ArrVal_1293 (_ BitVec 32)) (v_ArrVal_1294 (_ BitVec 32)) (v_ArrVal_1299 (_ BitVec 32))) (let ((.cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (.cse1 (bvadd |c_ULTIMATE.start_main_~c~0#1.offset| (_ bv12 32))) (.cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|))) (let ((.cse0 (store (store (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_1407))) (let ((.cse6 (store (store (store (store (select .cse7 |c_ULTIMATE.start_main_~b~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_1290) (bvadd |c_ULTIMATE.start_main_~b~0#1.offset| (_ bv12 32)) v_ArrVal_1289) (bvadd (_ bv16 32) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_1293) (bvadd |c_ULTIMATE.start_main_~b~0#1.offset| (_ bv20 32)) v_ArrVal_1294))) (let ((.cse4 (select (store .cse7 |c_ULTIMATE.start_main_~b~0#1.base| .cse6) |c_ULTIMATE.start_main_~c~0#1.base|))) (let ((.cse5 (bvadd (concat (select .cse6 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse6 |c_ULTIMATE.start_main_~b~0#1.offset|)) (concat (select .cse4 .cse3) (select .cse4 |c_ULTIMATE.start_main_~c~0#1.offset|))))) (store (store .cse4 .cse2 ((_ extract 31 0) .cse5)) .cse1 ((_ extract 63 32) .cse5)))))) (bvadd (_ bv16 32) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_1300) (bvadd |c_ULTIMATE.start_main_~c~0#1.offset| (_ bv20 32)) v_ArrVal_1299))) (or (= (concat (select .cse0 .cse1) (select .cse0 .cse2)) ((_ sign_extend 32) (_ bv1 32))) (not (= ((_ sign_extend 32) (_ bv0 32)) (concat (select .cse0 .cse3) (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|)))))))) is different from false [2021-11-23 17:17:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2021-11-23 17:17:24,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996225481] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:24,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:17:24,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 16, 17] total 33 [2021-11-23 17:17:24,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558586800] [2021-11-23 17:17:24,138 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-23 17:17:24,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 17:17:24,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:24,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 17:17:24,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=801, Unknown=2, NotChecked=118, Total=1056 [2021-11-23 17:17:24,139 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 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) [2021-11-23 17:17:28,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:28,514 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-11-23 17:17:28,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-23 17:17:28,517 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 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) Word has length 30 [2021-11-23 17:17:28,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:28,518 INFO L225 Difference]: With dead ends: 80 [2021-11-23 17:17:28,518 INFO L226 Difference]: Without dead ends: 78 [2021-11-23 17:17:28,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 79 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=212, Invalid=1276, Unknown=2, NotChecked=150, Total=1640 [2021-11-23 17:17:28,520 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 28 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:28,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 140 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 111 Invalid, 0 Unknown, 236 Unchecked, 0.8s Time] [2021-11-23 17:17:28,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-23 17:17:28,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2021-11-23 17:17:28,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.15625) internal successors, (74), 64 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:28,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2021-11-23 17:17:28,532 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 30 [2021-11-23 17:17:28,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:28,533 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2021-11-23 17:17:28,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 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) [2021-11-23 17:17:28,533 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2021-11-23 17:17:28,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 17:17:28,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:28,535 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:28,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:28,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:28,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:28,948 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:28,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:28,948 INFO L85 PathProgramCache]: Analyzing trace with hash 505093188, now seen corresponding path program 4 times [2021-11-23 17:17:28,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:28,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706884254] [2021-11-23 17:17:28,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:17:28,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:28,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:28,950 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:28,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 17:17:29,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:17:29,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-23 17:17:29,397 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 17:17:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 17:17:29,789 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-23 17:17:29,789 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 17:17:29,790 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 17:17:29,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:29,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:29,996 INFO L732 BasicCegarLoop]: Path program histogram: [4, 4, 1, 1, 1, 1, 1] [2021-11-23 17:17:29,999 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 17:17:30,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 05:17:30 BoogieIcfgContainer [2021-11-23 17:17:30,062 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 17:17:30,062 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 17:17:30,062 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 17:17:30,063 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 17:17:30,063 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:16:14" (3/4) ... [2021-11-23 17:17:30,065 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 17:17:30,124 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15426625-d1f6-4e31-ba53-3d49005da0d4/bin/utaipan-fb15Y9Yzbl/witness.graphml [2021-11-23 17:17:30,125 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 17:17:30,125 INFO L158 Benchmark]: Toolchain (without parser) took 76935.16ms. Allocated memory was 69.2MB in the beginning and 151.0MB in the end (delta: 81.8MB). Free memory was 51.3MB in the beginning and 116.8MB in the end (delta: -65.5MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. [2021-11-23 17:17:30,126 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 69.2MB. Free memory was 50.8MB in the beginning and 50.7MB in the end (delta: 54.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:17:30,126 INFO L158 Benchmark]: CACSL2BoogieTranslator took 354.41ms. Allocated memory is still 69.2MB. Free memory was 51.0MB in the beginning and 51.1MB in the end (delta: -99.2kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:17:30,126 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.50ms. Allocated memory is still 69.2MB. Free memory was 51.1MB in the beginning and 49.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:17:30,127 INFO L158 Benchmark]: Boogie Preprocessor took 59.18ms. Allocated memory is still 69.2MB. Free memory was 49.2MB in the beginning and 47.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:17:30,127 INFO L158 Benchmark]: RCFGBuilder took 528.53ms. Allocated memory is still 69.2MB. Free memory was 47.9MB in the beginning and 35.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 17:17:30,127 INFO L158 Benchmark]: TraceAbstraction took 75859.80ms. Allocated memory was 69.2MB in the beginning and 151.0MB in the end (delta: 81.8MB). Free memory was 35.1MB in the beginning and 119.9MB in the end (delta: -84.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:17:30,128 INFO L158 Benchmark]: Witness Printer took 62.51ms. Allocated memory is still 151.0MB. Free memory was 119.9MB in the beginning and 116.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 17:17:30,129 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 69.2MB. Free memory was 50.8MB in the beginning and 50.7MB in the end (delta: 54.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 354.41ms. Allocated memory is still 69.2MB. Free memory was 51.0MB in the beginning and 51.1MB in the end (delta: -99.2kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 64.50ms. Allocated memory is still 69.2MB. Free memory was 51.1MB in the beginning and 49.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.18ms. Allocated memory is still 69.2MB. Free memory was 49.2MB in the beginning and 47.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 528.53ms. Allocated memory is still 69.2MB. Free memory was 47.9MB in the beginning and 35.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 75859.80ms. Allocated memory was 69.2MB in the beginning and 151.0MB in the end (delta: 81.8MB). Free memory was 35.1MB in the beginning and 119.9MB in the end (delta: -84.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 62.51ms. Allocated memory is still 151.0MB. Free memory was 119.9MB in the beginning and 116.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, N=3] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] a[0] = 6 [L33] b[0] = 1 [L34] c[0] = 0 [L36] i=1 VAL [a={9:0}, b={7:0}, c={15:0}, i=1, N=3] [L36] COND TRUE i