./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/simple_built_from_end.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8 --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 279a162aa90145a7316b3266460570a8e3cad8e6 ................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8 --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 279a162aa90145a7316b3266460570a8e3cad8e6 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:19:36,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:19:36,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:19:36,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:19:36,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:19:36,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:19:36,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:19:36,427 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:19:36,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:19:36,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:19:36,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:19:36,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:19:36,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:19:36,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:19:36,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:19:36,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:19:36,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:19:36,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:19:36,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:19:36,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:19:36,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:19:36,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:19:36,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:19:36,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:19:36,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:19:36,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:19:36,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:19:36,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:19:36,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:19:36,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:19:36,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:19:36,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:19:36,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:19:36,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:19:36,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:19:36,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:19:36,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:19:36,473 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:19:36,473 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:19:36,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:19:36,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:19:36,476 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:19:36,508 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:19:36,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:19:36,509 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:19:36,509 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:19:36,510 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:19:36,510 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:19:36,510 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:19:36,510 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:19:36,511 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:19:36,511 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:19:36,511 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:19:36,511 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:19:36,512 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:19:36,512 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:19:36,512 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:19:36,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:19:36,513 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:19:36,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:19:36,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:19:36,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:19:36,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:19:36,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:19:36,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:19:36,515 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:19:36,516 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:19:36,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:19:36,516 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:19:36,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:19:36,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:19:36,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:19:36,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:19:36,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:19:36,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:19:36,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:19:36,518 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:19:36,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:19:36,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:19:36,519 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:19:36,519 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:19:36,520 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_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2021-10-13 07:19:36,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:19:36,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:19:36,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:19:36,841 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:19:36,842 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:19:36,843 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-13 07:19:36,938 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/data/8681f7099/b25dd76bbe5e4246acca7dffe5ff3987/FLAGde7b175b9 [2021-10-13 07:19:37,596 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:19:37,596 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-13 07:19:37,612 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/data/8681f7099/b25dd76bbe5e4246acca7dffe5ff3987/FLAGde7b175b9 [2021-10-13 07:19:37,921 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/data/8681f7099/b25dd76bbe5e4246acca7dffe5ff3987 [2021-10-13 07:19:37,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:19:37,926 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:19:37,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:19:37,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:19:37,931 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:19:37,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:19:37" (1/1) ... [2021-10-13 07:19:37,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7241748f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:37, skipping insertion in model container [2021-10-13 07:19:37,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:19:37" (1/1) ... [2021-10-13 07:19:37,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:19:38,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:19:38,337 WARN L228 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_2a69cadc-5825-4981-8d32-bfb0691e57ca/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-13 07:19:38,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:19:38,351 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:19:38,419 WARN L228 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_2a69cadc-5825-4981-8d32-bfb0691e57ca/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-13 07:19:38,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:19:38,456 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:19:38,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:38 WrapperNode [2021-10-13 07:19:38,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:19:38,459 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:19:38,459 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:19:38,459 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:19:38,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:38" (1/1) ... [2021-10-13 07:19:38,483 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:38" (1/1) ... [2021-10-13 07:19:38,510 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:19:38,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:19:38,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:19:38,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:19:38,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:38" (1/1) ... [2021-10-13 07:19:38,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:38" (1/1) ... [2021-10-13 07:19:38,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:38" (1/1) ... [2021-10-13 07:19:38,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:38" (1/1) ... [2021-10-13 07:19:38,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:38" (1/1) ... [2021-10-13 07:19:38,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:38" (1/1) ... [2021-10-13 07:19:38,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:38" (1/1) ... [2021-10-13 07:19:38,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:19:38,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:19:38,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:19:38,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:19:38,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:38" (1/1) ... [2021-10-13 07:19:38,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:19:38,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:19:38,599 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:19:38,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:19:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:19:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:19:38,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:19:38,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:19:38,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:19:38,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:19:38,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:19:38,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:19:38,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:19:39,009 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:19:39,010 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 07:19:39,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:19:39 BoogieIcfgContainer [2021-10-13 07:19:39,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:19:39,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:19:39,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:19:39,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:19:39,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:19:37" (1/3) ... [2021-10-13 07:19:39,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d1c490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:19:39, skipping insertion in model container [2021-10-13 07:19:39,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:38" (2/3) ... [2021-10-13 07:19:39,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d1c490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:19:39, skipping insertion in model container [2021-10-13 07:19:39,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:19:39" (3/3) ... [2021-10-13 07:19:39,022 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-10-13 07:19:39,028 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:19:39,041 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:19:39,104 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:19:39,110 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, mConcurrency=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 [2021-10-13 07:19:39,110 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:19:39,122 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:39,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:19:39,127 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:39,128 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:19:39,128 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:19:39,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:39,134 INFO L82 PathProgramCache]: Analyzing trace with hash 74567963, now seen corresponding path program 1 times [2021-10-13 07:19:39,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:39,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195779415] [2021-10-13 07:19:39,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:39,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:39,329 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:19:39,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195779415] [2021-10-13 07:19:39,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195779415] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:39,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:39,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:19:39,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090178956] [2021-10-13 07:19:39,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:19:39,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:19:39,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:19:39,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:19:39,355 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:39,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:39,371 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2021-10-13 07:19:39,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:19:39,373 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-10-13 07:19:39,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:39,382 INFO L225 Difference]: With dead ends: 17 [2021-10-13 07:19:39,383 INFO L226 Difference]: Without dead ends: 9 [2021-10-13 07:19:39,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:19:39,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-13 07:19:39,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-13 07:19:39,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:39,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-13 07:19:39,420 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2021-10-13 07:19:39,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:39,420 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-13 07:19:39,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:39,421 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-13 07:19:39,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:19:39,421 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:39,421 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:19:39,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:19:39,422 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:19:39,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:39,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1997841778, now seen corresponding path program 1 times [2021-10-13 07:19:39,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:39,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487161692] [2021-10-13 07:19:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:39,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:39,492 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:19:39,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487161692] [2021-10-13 07:19:39,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487161692] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:39,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:39,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:19:39,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105646494] [2021-10-13 07:19:39,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:19:39,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:19:39,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:19:39,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:19:39,498 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:39,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:39,514 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-10-13 07:19:39,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:19:39,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-10-13 07:19:39,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:39,516 INFO L225 Difference]: With dead ends: 18 [2021-10-13 07:19:39,516 INFO L226 Difference]: Without dead ends: 12 [2021-10-13 07:19:39,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:19:39,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-13 07:19:39,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-10-13 07:19:39,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:39,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-13 07:19:39,521 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-10-13 07:19:39,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:39,522 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-13 07:19:39,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:39,522 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-13 07:19:39,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:19:39,523 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:39,523 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:39,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:19:39,524 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:19:39,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:39,525 INFO L82 PathProgramCache]: Analyzing trace with hash -106563549, now seen corresponding path program 1 times [2021-10-13 07:19:39,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:39,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163415685] [2021-10-13 07:19:39,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:39,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:39,635 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:19:39,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163415685] [2021-10-13 07:19:39,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163415685] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:39,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:39,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:19:39,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772029696] [2021-10-13 07:19:39,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:19:39,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:19:39,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:19:39,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:19:39,639 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:39,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:39,675 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-10-13 07:19:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:19:39,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 07:19:39,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:39,677 INFO L225 Difference]: With dead ends: 17 [2021-10-13 07:19:39,677 INFO L226 Difference]: Without dead ends: 15 [2021-10-13 07:19:39,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:19:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-13 07:19:39,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2021-10-13 07:19:39,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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) [2021-10-13 07:19:39,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-13 07:19:39,682 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-10-13 07:19:39,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:39,683 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-13 07:19:39,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:39,683 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-10-13 07:19:39,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:19:39,684 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:39,684 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:39,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:19:39,685 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:19:39,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:39,686 INFO L82 PathProgramCache]: Analyzing trace with hash -649059074, now seen corresponding path program 1 times [2021-10-13 07:19:39,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:39,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115781352] [2021-10-13 07:19:39,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:39,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:39,850 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:19:39,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115781352] [2021-10-13 07:19:39,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115781352] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:19:39,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692024219] [2021-10-13 07:19:39,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:39,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:19:39,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:19:39,857 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:19:39,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:19:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:39,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 07:19:39,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:19:40,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:19:40,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:19:40,312 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 29 treesize of output 21 [2021-10-13 07:19:40,331 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 18 treesize of output 10 [2021-10-13 07:19:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:40,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:40,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692024219] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:19:40,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [715104610] [2021-10-13 07:19:40,537 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-13 07:19:40,537 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:19:40,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:19:40,551 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:19:40,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:19:40,593 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:19:40,595 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:19:40,596 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:19:40,596 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-13 07:19:40,600 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:19:40,601 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:19:40,602 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 07:19:40,604 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-10-13 07:19:40,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:19:40,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:19:40,648 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:19:40,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:19:40,649 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:19:40,652 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:19:40,657 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:19:40,658 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:19:40,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:19:40,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:19:40,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:19:40,707 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:19:40,709 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-10-13 07:19:40,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:19:40,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:92, output treesize:80 [2021-10-13 07:19:40,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:19:40,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:19:40,926 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_11| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 07:19:40,930 INFO L168 Benchmark]: Toolchain (without parser) took 3004.12 ms. Allocated memory was 92.3 MB in the beginning and 123.7 MB in the end (delta: 31.5 MB). Free memory was 56.1 MB in the beginning and 80.2 MB in the end (delta: -24.1 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:40,931 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 92.3 MB. Free memory was 61.4 MB in the beginning and 61.4 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:19:40,932 INFO L168 Benchmark]: CACSL2BoogieTranslator took 530.76 ms. Allocated memory is still 92.3 MB. Free memory was 55.9 MB in the beginning and 61.1 MB in the end (delta: -5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:40,933 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.66 ms. Allocated memory is still 92.3 MB. Free memory was 61.1 MB in the beginning and 59.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:40,934 INFO L168 Benchmark]: Boogie Preprocessor took 47.82 ms. Allocated memory is still 92.3 MB. Free memory was 59.6 MB in the beginning and 58.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:40,934 INFO L168 Benchmark]: RCFGBuilder took 452.98 ms. Allocated memory is still 92.3 MB. Free memory was 58.0 MB in the beginning and 46.8 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:40,937 INFO L168 Benchmark]: TraceAbstraction took 1914.77 ms. Allocated memory was 92.3 MB in the beginning and 123.7 MB in the end (delta: 31.5 MB). Free memory was 46.4 MB in the beginning and 80.2 MB in the end (delta: -33.8 MB). Peak memory consumption was 1.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:40,950 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 92.3 MB. Free memory was 61.4 MB in the beginning and 61.4 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 530.76 ms. Allocated memory is still 92.3 MB. Free memory was 55.9 MB in the beginning and 61.1 MB in the end (delta: -5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.66 ms. Allocated memory is still 92.3 MB. Free memory was 61.1 MB in the beginning and 59.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.82 ms. Allocated memory is still 92.3 MB. Free memory was 59.6 MB in the beginning and 58.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 452.98 ms. Allocated memory is still 92.3 MB. Free memory was 58.0 MB in the beginning and 46.8 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1914.77 ms. Allocated memory was 92.3 MB in the beginning and 123.7 MB in the end (delta: 31.5 MB). Free memory was 46.4 MB in the beginning and 80.2 MB in the end (delta: -33.8 MB). Peak memory consumption was 1.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_11| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_11|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:19:41,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:19:44,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:19:44,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:19:44,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:19:44,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:19:44,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:19:44,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:19:44,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:19:44,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:19:44,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:19:44,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:19:44,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:19:44,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:19:44,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:19:44,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:19:44,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:19:44,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:19:44,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:19:44,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:19:44,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:19:44,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:19:44,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:19:44,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:19:44,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:19:44,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:19:44,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:19:44,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:19:44,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:19:44,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:19:44,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:19:44,193 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:19:44,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:19:44,197 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:19:44,198 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:19:44,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:19:44,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:19:44,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:19:44,202 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:19:44,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:19:44,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:19:44,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:19:44,226 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:19:44,267 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:19:44,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:19:44,271 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:19:44,271 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:19:44,271 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:19:44,272 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:19:44,272 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:19:44,272 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:19:44,273 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:19:44,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:19:44,276 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:19:44,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:19:44,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:19:44,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:19:44,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:19:44,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:19:44,278 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:19:44,278 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:19:44,278 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:19:44,279 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:19:44,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:19:44,279 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:19:44,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:19:44,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:19:44,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:19:44,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:19:44,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:19:44,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:19:44,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:19:44,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:19:44,282 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:19:44,282 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:19:44,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:19:44,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:19:44,283 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:19:44,284 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_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2021-10-13 07:19:44,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:19:44,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:19:44,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:19:44,805 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:19:44,805 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:19:44,809 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-13 07:19:44,905 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/data/77c0a20a1/f05c00b2e61443a293bbe6175ca76502/FLAGdf619b6a2 [2021-10-13 07:19:45,717 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:19:45,718 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-13 07:19:45,747 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/data/77c0a20a1/f05c00b2e61443a293bbe6175ca76502/FLAGdf619b6a2 [2021-10-13 07:19:45,974 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/data/77c0a20a1/f05c00b2e61443a293bbe6175ca76502 [2021-10-13 07:19:45,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:19:45,979 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:19:45,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:19:45,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:19:45,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:19:45,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:19:45" (1/1) ... [2021-10-13 07:19:45,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eccb1e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:45, skipping insertion in model container [2021-10-13 07:19:45,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:19:45" (1/1) ... [2021-10-13 07:19:45,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:19:46,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:19:46,447 WARN L228 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_2a69cadc-5825-4981-8d32-bfb0691e57ca/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-13 07:19:46,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:19:46,469 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:19:46,514 WARN L228 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_2a69cadc-5825-4981-8d32-bfb0691e57ca/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-13 07:19:46,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:19:46,561 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:19:46,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:46 WrapperNode [2021-10-13 07:19:46,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:19:46,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:19:46,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:19:46,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:19:46,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:46" (1/1) ... [2021-10-13 07:19:46,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:46" (1/1) ... [2021-10-13 07:19:46,649 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:19:46,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:19:46,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:19:46,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:19:46,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:46" (1/1) ... [2021-10-13 07:19:46,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:46" (1/1) ... [2021-10-13 07:19:46,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:46" (1/1) ... [2021-10-13 07:19:46,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:46" (1/1) ... [2021-10-13 07:19:46,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:46" (1/1) ... [2021-10-13 07:19:46,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:46" (1/1) ... [2021-10-13 07:19:46,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:46" (1/1) ... [2021-10-13 07:19:46,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:19:46,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:19:46,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:19:46,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:19:46,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:46" (1/1) ... [2021-10-13 07:19:46,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:19:46,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:19:46,725 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:19:46,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:19:46,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:19:46,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:19:46,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:19:46,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:19:46,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:19:46,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:19:46,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:19:46,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:19:46,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:19:47,244 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:19:47,246 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 07:19:47,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:19:47 BoogieIcfgContainer [2021-10-13 07:19:47,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:19:47,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:19:47,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:19:47,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:19:47,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:19:45" (1/3) ... [2021-10-13 07:19:47,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aae5077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:19:47, skipping insertion in model container [2021-10-13 07:19:47,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:46" (2/3) ... [2021-10-13 07:19:47,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aae5077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:19:47, skipping insertion in model container [2021-10-13 07:19:47,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:19:47" (3/3) ... [2021-10-13 07:19:47,281 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-10-13 07:19:47,288 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:19:47,288 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:19:47,370 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:19:47,382 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, mConcurrency=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 [2021-10-13 07:19:47,385 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:19:47,403 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:47,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:19:47,425 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:47,426 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:19:47,428 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:19:47,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:47,436 INFO L82 PathProgramCache]: Analyzing trace with hash 890006222, now seen corresponding path program 1 times [2021-10-13 07:19:47,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:19:47,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830065204] [2021-10-13 07:19:47,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:47,458 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:19:47,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:19:47,465 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:19:47,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:19:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:47,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:19:47,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:19:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:47,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:47,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:19:47,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830065204] [2021-10-13 07:19:47,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830065204] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:47,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:47,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:19:47,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879770762] [2021-10-13 07:19:47,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:19:47,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:19:47,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:19:47,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:19:47,743 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:47,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:47,762 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2021-10-13 07:19:47,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:19:47,764 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-10-13 07:19:47,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:47,775 INFO L225 Difference]: With dead ends: 22 [2021-10-13 07:19:47,776 INFO L226 Difference]: Without dead ends: 10 [2021-10-13 07:19:47,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:19:47,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-13 07:19:47,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-13 07:19:47,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-10-13 07:19:47,830 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-10-13 07:19:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:47,830 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-13 07:19:47,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:47,831 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-10-13 07:19:47,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:19:47,832 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:47,832 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:19:47,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:19:48,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:19:48,046 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:19:48,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:48,053 INFO L82 PathProgramCache]: Analyzing trace with hash 889648730, now seen corresponding path program 1 times [2021-10-13 07:19:48,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:19:48,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817941462] [2021-10-13 07:19:48,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:48,056 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:19:48,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:19:48,058 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:19:48,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:19:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:48,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:19:48,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:19:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:48,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:48,360 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:19:48,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817941462] [2021-10-13 07:19:48,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817941462] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:48,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:48,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:19:48,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630635110] [2021-10-13 07:19:48,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:19:48,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:19:48,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:19:48,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:19:48,364 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:48,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:48,412 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-10-13 07:19:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:19:48,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-10-13 07:19:48,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:48,413 INFO L225 Difference]: With dead ends: 19 [2021-10-13 07:19:48,414 INFO L226 Difference]: Without dead ends: 13 [2021-10-13 07:19:48,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:19:48,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-13 07:19:48,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2021-10-13 07:19:48,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:48,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-13 07:19:48,418 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-10-13 07:19:48,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:48,419 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-13 07:19:48,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:48,419 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-13 07:19:48,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:19:48,420 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:48,420 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:48,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:19:48,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:19:48,632 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:19:48,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:48,633 INFO L82 PathProgramCache]: Analyzing trace with hash 671286241, now seen corresponding path program 1 times [2021-10-13 07:19:48,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:19:48,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166001885] [2021-10-13 07:19:48,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:48,634 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:19:48,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:19:48,643 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:19:48,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:19:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:48,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:19:48,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:19:48,905 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-13 07:19:48,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 7 [2021-10-13 07:19:49,000 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 15 treesize of output 7 [2021-10-13 07:19:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:49,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:49,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:49,121 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:19:49,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166001885] [2021-10-13 07:19:49,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166001885] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:49,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:49,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 07:19:49,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32038682] [2021-10-13 07:19:49,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:19:49,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:19:49,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:19:49,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:19:49,129 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:49,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:49,217 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-10-13 07:19:49,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:19:49,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 07:19:49,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:49,219 INFO L225 Difference]: With dead ends: 18 [2021-10-13 07:19:49,219 INFO L226 Difference]: Without dead ends: 16 [2021-10-13 07:19:49,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:19:49,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-13 07:19:49,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2021-10-13 07:19:49,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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) [2021-10-13 07:19:49,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-13 07:19:49,223 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-10-13 07:19:49,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:49,224 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-13 07:19:49,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:49,224 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-10-13 07:19:49,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:19:49,225 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:49,229 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:49,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:19:49,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:19:49,441 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:19:49,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:49,442 INFO L82 PathProgramCache]: Analyzing trace with hash 925471903, now seen corresponding path program 1 times [2021-10-13 07:19:49,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:19:49,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780018043] [2021-10-13 07:19:49,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:49,443 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:19:49,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:19:49,447 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:19:49,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:19:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:49,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:19:49,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:19:49,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:19:49,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:19:49,845 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 37 treesize of output 25 [2021-10-13 07:19:49,854 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 22 treesize of output 10 [2021-10-13 07:19:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:49,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:50,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:19:50,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780018043] [2021-10-13 07:19:50,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780018043] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:19:50,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1054893691] [2021-10-13 07:19:50,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:50,011 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:19:50,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:19:50,017 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:19:50,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-13 07:19:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:50,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:19:50,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:19:50,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:19:50,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:19:50,440 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 29 treesize of output 21 [2021-10-13 07:19:50,448 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 18 treesize of output 10 [2021-10-13 07:19:50,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:50,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:50,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1054893691] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:19:50,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696809041] [2021-10-13 07:19:50,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:50,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:19:50,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:19:50,601 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:19:50,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 07:19:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:50,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:19:50,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:19:50,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:19:50,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:19:50,913 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 29 treesize of output 21 [2021-10-13 07:19:50,929 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 18 treesize of output 10 [2021-10-13 07:19:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:50,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:51,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696809041] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:19:51,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:19:51,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 4, 5, 4] total 6 [2021-10-13 07:19:51,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321071244] [2021-10-13 07:19:51,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:19:51,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:19:51,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:19:51,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:19:51,074 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:51,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:51,229 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-10-13 07:19:51,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:19:51,231 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 07:19:51,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:51,232 INFO L225 Difference]: With dead ends: 27 [2021-10-13 07:19:51,232 INFO L226 Difference]: Without dead ends: 18 [2021-10-13 07:19:51,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:19:51,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-13 07:19:51,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-10-13 07:19:51,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:51,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-13 07:19:51,238 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2021-10-13 07:19:51,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:51,238 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-13 07:19:51,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:51,239 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-13 07:19:51,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 07:19:51,240 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:51,240 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:51,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:19:51,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:19:51,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:19:51,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:19:51,841 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:19:51,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:51,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1819205402, now seen corresponding path program 2 times [2021-10-13 07:19:51,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:19:51,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604234861] [2021-10-13 07:19:51,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:19:51,844 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:19:51,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:19:51,852 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:19:51,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:19:52,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:19:52,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:19:52,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:19:52,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:19:52,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-10-13 07:19:52,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-10-13 07:19:52,215 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 07:19:52,216 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 1 case distinctions, treesize of input 30 treesize of output 22 [2021-10-13 07:19:52,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:19:52,431 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 40 treesize of output 32 [2021-10-13 07:19:52,436 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 29 treesize of output 21 [2021-10-13 07:19:52,472 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 15 treesize of output 7 [2021-10-13 07:19:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:52,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:52,697 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:19:52,699 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-10-13 07:19:54,723 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset) v_DerPreprocessor_1)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32))) is different from false [2021-10-13 07:19:56,756 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_1)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32))) is different from false [2021-10-13 07:19:56,788 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:19:56,789 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 07:19:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-10-13 07:19:56,935 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:19:56,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604234861] [2021-10-13 07:19:56,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604234861] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:19:56,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [884767186] [2021-10-13 07:19:56,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:19:56,937 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:19:56,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:19:56,938 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:19:56,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-13 07:19:57,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:19:57,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:19:57,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:19:57,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:19:57,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:19:57,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 7 [2021-10-13 07:19:57,388 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:19:57,388 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 14 treesize of output 14 [2021-10-13 07:19:57,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2021-10-13 07:19:57,541 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 07:19:57,541 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 1 case distinctions, treesize of input 38 treesize of output 30 [2021-10-13 07:19:57,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:19:57,764 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 48 treesize of output 36 [2021-10-13 07:19:57,772 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 33 treesize of output 25 [2021-10-13 07:19:57,890 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:19:57,890 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 14 [2021-10-13 07:19:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:57,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:57,949 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:19:57,950 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:20:00,097 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~t~0.base_18 (_ BitVec 32)) (v_DerPreprocessor_3 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_18))) (= (_ bv1 32) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_18 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_18) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_3)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset)))) is different from false [2021-10-13 07:20:00,118 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:00,119 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-10-13 07:20:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-10-13 07:20:00,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [884767186] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:20:00,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523031472] [2021-10-13 07:20:00,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:20:00,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:20:00,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:20:00,215 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:20:00,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 07:20:00,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:20:00,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:20:00,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 07:20:00,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:20:00,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:20:00,517 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-13 07:20:00,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 7 [2021-10-13 07:20:00,614 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:20:00,615 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 17 treesize of output 17 [2021-10-13 07:20:00,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2021-10-13 07:20:00,774 INFO L354 Elim1Store]: treesize reduction 87, result has 11.2 percent of original size [2021-10-13 07:20:00,775 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 1 case distinctions, treesize of input 49 treesize of output 41 [2021-10-13 07:20:00,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2021-10-13 07:20:01,007 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 45 treesize of output 33 [2021-10-13 07:20:01,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-10-13 07:20:01,145 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:20:01,146 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 14 [2021-10-13 07:20:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:20:01,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:20:01,217 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:01,218 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:20:03,365 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_3 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_20 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_20))) (= (_ bv1 32) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_20 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_20) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_3)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset)))) is different from false [2021-10-13 07:20:03,384 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:03,386 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-10-13 07:20:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-10-13 07:20:03,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523031472] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:20:03,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:20:03,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8, 8, 8, 8] total 29 [2021-10-13 07:20:03,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914394615] [2021-10-13 07:20:03,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 07:20:03,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:20:03,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 07:20:03,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=493, Unknown=4, NotChecked=196, Total=812 [2021-10-13 07:20:03,499 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 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) [2021-10-13 07:20:05,823 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~p~0.base)) (_ bv1 1))) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (forall ((v_DerPreprocessor_3 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_20 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_20))) (= (_ bv1 32) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_20 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_20) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_3)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset)))) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~t~0.base)) (_ bv1 1))) (forall ((v_ULTIMATE.start_main_~t~0.base_18 (_ BitVec 32)) (v_DerPreprocessor_3 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_18))) (= (_ bv1 32) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_18 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_18) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_3)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset)))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_1)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)))) is different from false [2021-10-13 07:20:07,832 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~t~0.base)) (_ bv1 1))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (not (= c_ULTIMATE.start_main_~t~0.base c_ULTIMATE.start_main_~p~0.base)) (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset) v_DerPreprocessor_1)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)))) is different from false [2021-10-13 07:20:09,841 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)))) (and (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~p~0.base)) (_ bv1 1))) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (forall ((v_DerPreprocessor_3 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_20 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_20))) (= (_ bv1 32) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_20 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_20) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_3)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset)))) (not (= .cse0 c_ULTIMATE.start_main_~p~0.base)) (forall ((v_ULTIMATE.start_main_~t~0.base_18 (_ BitVec 32)) (v_DerPreprocessor_3 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_18))) (= (_ bv1 32) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_18 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_18) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_3)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset)))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_1)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32))) (= (_ bv1 32) (select (select |c_#memory_int| .cse0) (_ bv0 32))) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32)))) is different from false [2021-10-13 07:20:10,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:20:10,073 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-10-13 07:20:10,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:20:10,077 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 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) Word has length 15 [2021-10-13 07:20:10,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:20:10,078 INFO L225 Difference]: With dead ends: 22 [2021-10-13 07:20:10,078 INFO L226 Difference]: Without dead ends: 20 [2021-10-13 07:20:10,079 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 15276.5ms TimeCoverageRelationStatistics Valid=147, Invalid=576, Unknown=7, NotChecked=392, Total=1122 [2021-10-13 07:20:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-13 07:20:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-10-13 07:20:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:20:10,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-10-13 07:20:10,084 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2021-10-13 07:20:10,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:20:10,084 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-10-13 07:20:10,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 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) [2021-10-13 07:20:10,090 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-10-13 07:20:10,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:20:10,092 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:20:10,092 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 07:20:10,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:20:10,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-13 07:20:10,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:20:10,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:20:10,716 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:20:10,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:20:10,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2045993606, now seen corresponding path program 3 times [2021-10-13 07:20:10,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:20:10,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596813258] [2021-10-13 07:20:10,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:20:10,718 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:20:10,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:20:10,719 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:20:10,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 07:20:10,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 07:20:10,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:20:11,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 07:20:11,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:20:11,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:20:11,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:20:11,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 7 [2021-10-13 07:20:11,275 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:11,279 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-10-13 07:20:11,356 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-10-13 07:20:11,357 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 1 case distinctions, treesize of input 55 treesize of output 62 [2021-10-13 07:20:11,364 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 57 treesize of output 45 [2021-10-13 07:20:11,392 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 07:20:11,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-10-13 07:20:14,215 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-10-13 07:20:14,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 59 [2021-10-13 07:20:14,241 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-10-13 07:20:14,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 40 [2021-10-13 07:20:14,385 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 19 treesize of output 11 [2021-10-13 07:20:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:20:14,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:20:14,879 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:14,880 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-10-13 07:20:14,885 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:14,888 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-10-13 07:20:14,894 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 782 treesize of output 704 [2021-10-13 07:20:14,923 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:14,928 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 637 [2021-10-13 07:20:17,753 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (let ((.cse2 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset)) (.cse3 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_8) .cse2 c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse3)) (.cse0 (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_10) .cse2 c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse3))) (or (and (= .cse0 c_ULTIMATE.start_main_~t~0.offset) (= .cse1 ULTIMATE.start_main_~t~0.base)) (and (= .cse1 (_ bv0 32)) (= .cse0 (_ bv0 32))))))) is different from false [2021-10-13 07:20:20,192 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (let ((.cse2 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse0 (= (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_10) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse2) (_ bv0 32))) (.cse1 (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_8) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse2))) (or (and .cse0 (= ULTIMATE.start_main_~t~0.base .cse1)) (and .cse0 (= .cse1 (_ bv0 32))))))) is different from false [2021-10-13 07:20:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-10-13 07:20:20,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:20:20,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596813258] [2021-10-13 07:20:20,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596813258] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:20:20,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1726420183] [2021-10-13 07:20:20,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:20:20,594 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:20:20,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:20:20,596 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:20:20,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-13 07:20:20,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 07:20:20,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:20:20,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:20:21,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:20:21,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:20:21,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:20:21,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:20:21,252 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:20:21,252 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 19 treesize of output 19 [2021-10-13 07:20:21,387 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:21,388 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-10-13 07:20:21,431 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 07:20:21,431 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 1 case distinctions, treesize of input 59 treesize of output 62 [2021-10-13 07:20:21,443 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:21,445 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-10-13 07:20:21,470 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 07:20:21,470 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 1 case distinctions, treesize of input 45 treesize of output 48 [2021-10-13 07:20:22,039 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-10-13 07:20:22,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 44 [2021-10-13 07:20:22,073 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-10-13 07:20:22,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 25 [2021-10-13 07:20:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:20:22,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:20:22,400 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:22,409 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-10-13 07:20:22,413 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:22,414 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-10-13 07:20:25,884 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 35 treesize of output 33 [2021-10-13 07:20:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:20:25,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1726420183] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:20:25,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428414221] [2021-10-13 07:20:25,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:20:25,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:20:25,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:20:25,918 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:20:25,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 07:20:26,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 07:20:26,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:20:26,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:20:26,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:20:26,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:20:26,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:20:26,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:20:26,369 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:20:26,369 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 15 treesize of output 15 [2021-10-13 07:20:26,461 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:26,463 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-10-13 07:20:26,507 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 07:20:26,507 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 1 case distinctions, treesize of input 59 treesize of output 62 [2021-10-13 07:20:26,513 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 57 treesize of output 45 [2021-10-13 07:20:26,534 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 07:20:26,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-10-13 07:20:26,919 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-10-13 07:20:26,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 44 [2021-10-13 07:20:26,944 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-10-13 07:20:26,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 25 [2021-10-13 07:20:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:20:26,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:20:27,127 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:27,128 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-10-13 07:20:27,131 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:27,132 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-10-13 07:20:38,457 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 34 treesize of output 32 [2021-10-13 07:20:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:20:38,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428414221] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:20:38,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:20:38,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8, 8, 8, 8] total 26 [2021-10-13 07:20:38,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440543456] [2021-10-13 07:20:38,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 07:20:38,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:20:38,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 07:20:38,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=470, Unknown=4, NotChecked=90, Total=650 [2021-10-13 07:20:38,489 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:20:40,809 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~p~0.base)) (_ bv1 1))) (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (let ((.cse2 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse0 (= (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_10) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse2) (_ bv0 32))) (.cse1 (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_8) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse2))) (or (and .cse0 (= ULTIMATE.start_main_~t~0.base .cse1)) (and .cse0 (= .cse1 (_ bv0 32))))))) (exists ((v_ULTIMATE.start_main_~p~0.base_44 (_ BitVec 32))) (and (= (_ bv1 32) (select (select |c_#memory_int| v_ULTIMATE.start_main_~p~0.base_44) (_ bv0 32))) (or (= c_ULTIMATE.start_main_~p~0.base (_ bv0 32)) (= c_ULTIMATE.start_main_~p~0.base v_ULTIMATE.start_main_~p~0.base_44)))) (= (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32))) is different from false [2021-10-13 07:20:42,819 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (let ((.cse2 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset)) (.cse3 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_8) .cse2 c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse3)) (.cse0 (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_10) .cse2 c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse3))) (or (and (= .cse0 c_ULTIMATE.start_main_~t~0.offset) (= .cse1 ULTIMATE.start_main_~t~0.base)) (and (= .cse1 (_ bv0 32)) (= .cse0 (_ bv0 32))))))) (not (= c_ULTIMATE.start_main_~t~0.base c_ULTIMATE.start_main_~p~0.base)) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32))) is different from false [2021-10-13 07:20:45,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:20:45,867 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-10-13 07:20:45,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 07:20:45,868 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 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 [2021-10-13 07:20:45,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:20:45,869 INFO L225 Difference]: With dead ends: 36 [2021-10-13 07:20:45,869 INFO L226 Difference]: Without dead ends: 24 [2021-10-13 07:20:45,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 26497.1ms TimeCoverageRelationStatistics Valid=125, Invalid=697, Unknown=6, NotChecked=228, Total=1056 [2021-10-13 07:20:45,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-13 07:20:45,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-10-13 07:20:45,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 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) [2021-10-13 07:20:45,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-10-13 07:20:45,877 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-10-13 07:20:45,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:20:45,877 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-10-13 07:20:45,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:20:45,878 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-10-13 07:20:45,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 07:20:45,879 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:20:45,879 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 07:20:45,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-10-13 07:20:46,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:20:46,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:20:46,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:20:46,482 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:20:46,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:20:46,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1299552385, now seen corresponding path program 4 times [2021-10-13 07:20:46,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:20:46,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8333386] [2021-10-13 07:20:46,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 07:20:46,484 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:20:46,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:20:46,484 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:20:46,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 07:20:46,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 07:20:46,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:20:46,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 07:20:46,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:20:46,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:20:46,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 7 [2021-10-13 07:20:46,901 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:20:46,902 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 14 treesize of output 14 [2021-10-13 07:20:46,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:20:46,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2021-10-13 07:20:47,023 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 07:20:47,023 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 1 case distinctions, treesize of input 38 treesize of output 30 [2021-10-13 07:20:47,224 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:47,225 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-10-13 07:20:47,355 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-10-13 07:20:47,356 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 1 case distinctions, treesize of input 92 treesize of output 95 [2021-10-13 07:20:47,462 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-10-13 07:20:47,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 96 [2021-10-13 07:20:47,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 78 [2021-10-13 07:20:47,498 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 07:20:47,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 74 [2021-10-13 07:20:47,501 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:20:49,415 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-10-13 07:20:49,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 77 [2021-10-13 07:20:49,446 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-10-13 07:20:49,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 58 [2021-10-13 07:20:49,840 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-10-13 07:20:49,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 35 [2021-10-13 07:20:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:20:49,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:20:50,292 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:50,293 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-10-13 07:20:50,296 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:50,297 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-10-13 07:20:50,300 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:50,301 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-10-13 07:20:52,355 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (let ((.cse0 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset)) (.cse1 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) .cse0 v_DerPreprocessor_20)) (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_19) .cse0 c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse1)) (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_21) .cse0 c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse1))) (_ bv1 32))) is different from false [2021-10-13 07:20:54,424 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (let ((.cse0 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_20)) (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_19) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse0)) (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_21) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse0))) (_ bv1 32))) is different from false [2021-10-13 07:20:54,470 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:54,486 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2090 [2021-10-13 07:21:36,021 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_20 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_33 (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_34 (_ BitVec 32))) (or (= (select (select (let ((.cse0 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_34 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_34) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_22)))) (store .cse0 v_ULTIMATE.start_main_~t~0.base_33 (store (store (select .cse0 v_ULTIMATE.start_main_~t~0.base_33) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_20))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (= v_ULTIMATE.start_main_~t~0.base_33 v_ULTIMATE.start_main_~t~0.base_34) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_34)))))))) is different from false [2021-10-13 07:21:36,037 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:21:36,038 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-10-13 07:21:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 7 refuted. 2 times theorem prover too weak. 0 trivial. 7 not checked. [2021-10-13 07:21:38,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:21:38,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8333386] [2021-10-13 07:21:38,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8333386] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:21:38,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [412252041] [2021-10-13 07:21:38,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 07:21:38,583 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:21:38,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:21:38,591 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:21:38,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-13 07:21:39,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 07:21:39,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:21:39,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 07:21:39,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:21:39,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:21:39,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-10-13 07:21:39,109 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:21:39,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-10-13 07:21:39,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2021-10-13 07:21:39,286 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 07:21:39,286 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 1 case distinctions, treesize of input 53 treesize of output 45 [2021-10-13 07:21:39,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:21:39,432 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-13 07:21:39,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 30 treesize of output 32 [2021-10-13 07:21:39,629 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:21:39,630 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 104 [2021-10-13 07:21:39,679 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 07:21:39,679 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 1 case distinctions, treesize of input 104 treesize of output 99 [2021-10-13 07:21:39,686 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 118 treesize of output 106 [2021-10-13 07:21:39,728 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 07:21:39,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 102 [2021-10-13 07:21:39,780 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-10-13 07:21:39,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 94 [2021-10-13 07:21:39,782 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:21:40,690 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-10-13 07:21:40,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 70 [2021-10-13 07:21:40,728 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-10-13 07:21:40,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 51 [2021-10-13 07:21:41,020 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-13 07:21:41,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-10-13 07:21:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:41,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:21:41,104 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:21:41,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-13 07:21:41,108 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:21:41,109 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-10-13 07:21:41,115 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:21:41,116 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-10-13 07:21:44,198 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_36))) (= (let ((.cse0 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_36 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26)) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_36 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) v_DerPreprocessor_25) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse0)) (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_36 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) v_DerPreprocessor_27) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse0))) (_ bv1 32)))) is different from false [2021-10-13 07:21:44,244 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:21:44,260 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4208 [2021-10-13 07:23:44,829 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~t~0.base_37 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (or (= (select (select (let ((.cse0 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_37 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_37) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_28)))) (store .cse0 v_ULTIMATE.start_main_~t~0.base_36 (store (store (select .cse0 v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (not (= (_ bv0 1) (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_37 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_36)))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_37))))) is different from false [2021-10-13 07:23:44,852 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:44,853 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-10-13 07:23:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 11 refuted. 2 times theorem prover too weak. 0 trivial. 3 not checked. [2021-10-13 07:23:50,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [412252041] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:23:50,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689737241] [2021-10-13 07:23:50,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 07:23:50,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:23:50,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:23:50,915 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:23:50,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 07:23:51,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 07:23:51,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:23:51,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 07:23:51,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:23:51,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:23:51,413 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-13 07:23:51,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 7 [2021-10-13 07:23:51,542 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:23:51,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-10-13 07:23:51,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2021-10-13 07:23:51,812 INFO L354 Elim1Store]: treesize reduction 87, result has 11.2 percent of original size [2021-10-13 07:23:51,813 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 1 case distinctions, treesize of input 56 treesize of output 48 [2021-10-13 07:23:51,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2021-10-13 07:23:52,116 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-13 07:23:52,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 31 treesize of output 33 [2021-10-13 07:23:52,317 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:52,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 101 [2021-10-13 07:23:52,363 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 07:23:52,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 96 [2021-10-13 07:23:52,451 INFO L354 Elim1Store]: treesize reduction 230, result has 13.2 percent of original size [2021-10-13 07:23:52,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 110 [2021-10-13 07:23:52,465 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 104 treesize of output 92 [2021-10-13 07:23:52,492 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 07:23:52,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 88 [2021-10-13 07:23:52,493 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:23:55,368 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-10-13 07:23:55,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 67 [2021-10-13 07:23:55,399 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-10-13 07:23:55,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 48 [2021-10-13 07:23:55,784 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-13 07:23:55,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-10-13 07:23:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:55,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:23:55,866 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:55,867 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-13 07:23:55,870 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:55,871 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-10-13 07:23:55,873 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:55,875 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-10-13 07:24:00,315 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~t~0.base_39 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (or (= (_ bv1 32) (let ((.cse0 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_39 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_39) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26)) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_39 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_39) (_ bv0 32) v_DerPreprocessor_25) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse0)) (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_39 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_39) (_ bv0 32) v_DerPreprocessor_27) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse0)))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_39))))) is different from false [2021-10-13 07:24:00,348 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:24:00,356 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1040 [2021-10-13 07:24:26,797 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_40 (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_40 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_36)))))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_40))) (= (select (select (let ((.cse0 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_40 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_40) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_28)))) (store .cse0 v_ULTIMATE.start_main_~t~0.base_36 (store (store (select .cse0 v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)))) is different from false [2021-10-13 07:24:26,814 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:24:26,815 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-10-13 07:24:30,838 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-10-13 07:24:30,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689737241] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:24:30,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:24:30,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11, 11, 11, 11] total 44 [2021-10-13 07:24:30,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234462689] [2021-10-13 07:24:30,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-13 07:24:30,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:24:30,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-13 07:24:30,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1124, Unknown=18, NotChecked=532, Total=1892 [2021-10-13 07:24:30,844 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:35,340 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_DerPreprocessor_20 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_33 (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_34 (_ BitVec 32))) (or (= (select (select (let ((.cse0 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_34 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_34) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_22)))) (store .cse0 v_ULTIMATE.start_main_~t~0.base_33 (store (store (select .cse0 v_ULTIMATE.start_main_~t~0.base_33) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_20))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (= v_ULTIMATE.start_main_~t~0.base_33 v_ULTIMATE.start_main_~t~0.base_34) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_34)))))))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~p~0.base)) (_ bv1 1))) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (forall ((v_DerPreprocessor_20 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_33 (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32))) (let ((.cse4 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset))) (let ((.cse2 (= c_ULTIMATE.start_main_~t~0.base v_ULTIMATE.start_main_~t~0.base_33)) (.cse1 (= .cse4 (_ bv0 32)))) (or (and (or (not .cse1) (not .cse2)) (or (= (select (select (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) .cse4 v_DerPreprocessor_22)))) (store .cse3 v_ULTIMATE.start_main_~t~0.base_33 (store (store (select .cse3 v_ULTIMATE.start_main_~t~0.base_33) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_20))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (and .cse2 (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32))))) (and .cse2 .cse1 (forall ((v_DerPreprocessor_19 (_ BitVec 32))) (= (_ bv1 32) (select (select (let ((.cse5 (store |c_#memory_int| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset) v_DerPreprocessor_22)))) (store .cse5 v_ULTIMATE.start_main_~t~0.base_33 (store (store (select .cse5 v_ULTIMATE.start_main_~t~0.base_33) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_20))) v_DerPreprocessor_19) v_DerPreprocessor_21)))))))) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~t~0.base)) (_ bv1 1))) (forall ((v_DerPreprocessor_25 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (= (let ((.cse6 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset)) (.cse7 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) .cse6 v_DerPreprocessor_26)) (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_25) .cse6 c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse7)) (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_27) .cse6 c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse7))) (_ bv1 32))) (forall ((v_ULTIMATE.start_main_~t~0.base_37 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (or (= (select (select (let ((.cse8 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_37 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_37) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_28)))) (store .cse8 v_ULTIMATE.start_main_~t~0.base_36 (store (store (select .cse8 v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (not (= (_ bv0 1) (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_37 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_36)))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_37))))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (forall ((v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_40 (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_40 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_36)))))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_40))) (= (select (select (let ((.cse9 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_40 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_40) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_28)))) (store .cse9 v_ULTIMATE.start_main_~t~0.base_36 (store (store (select .cse9 v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32))))) is different from false [2021-10-13 07:24:41,795 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)))) (and (forall ((v_DerPreprocessor_20 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_33 (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_34 (_ BitVec 32))) (or (= (select (select (let ((.cse0 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_34 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_34) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_22)))) (store .cse0 v_ULTIMATE.start_main_~t~0.base_33 (store (store (select .cse0 v_ULTIMATE.start_main_~t~0.base_33) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_20))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (= v_ULTIMATE.start_main_~t~0.base_33 v_ULTIMATE.start_main_~t~0.base_34) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_34)))))))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~p~0.base)) (_ bv1 1))) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (not (= .cse1 c_ULTIMATE.start_main_~p~0.base)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| .cse1))))) (_ bv1 1))) (forall ((v_ULTIMATE.start_main_~t~0.base_39 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (or (= (_ bv1 32) (let ((.cse2 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_39 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_39) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26)) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_39 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_39) (_ bv0 32) v_DerPreprocessor_25) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse2)) (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_39 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_39) (_ bv0 32) v_DerPreprocessor_27) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse2)))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_39))))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~t~0.base)) (_ bv1 1))) (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (let ((.cse3 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_20)) (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_19) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse3)) (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_21) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse3))) (_ bv1 32))) (forall ((v_ULTIMATE.start_main_~t~0.base_37 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (or (= (select (select (let ((.cse4 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_37 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_37) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_28)))) (store .cse4 v_ULTIMATE.start_main_~t~0.base_36 (store (store (select .cse4 v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (not (= (_ bv0 1) (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_37 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_36)))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_37))))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (forall ((v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_36))) (= (let ((.cse5 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_36 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26)) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_36 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) v_DerPreprocessor_25) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse5)) (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_36 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) v_DerPreprocessor_27) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse5))) (_ bv1 32)))) (= (_ bv1 32) (select (select |c_#memory_int| .cse1) (_ bv0 32))) (forall ((v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_40 (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_40 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_36)))))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_40))) (= (select (select (let ((.cse6 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_40 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_40) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_28)))) (store .cse6 v_ULTIMATE.start_main_~t~0.base_36 (store (store (select .cse6 v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)))) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32)))) is different from false [2021-10-13 07:24:41,932 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)))) (and (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (let ((.cse0 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset)) (.cse1 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) .cse0 v_DerPreprocessor_20)) (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_19) .cse0 c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse1)) (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_21) .cse0 c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse1))) (_ bv1 32))) (not (= .cse2 c_ULTIMATE.start_main_~p~0.base)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (not (= c_ULTIMATE.start_main_~t~0.base .cse2)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~p~0.base))))))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~t~0.base)) (_ bv1 1))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (not (= c_ULTIMATE.start_main_~t~0.base c_ULTIMATE.start_main_~p~0.base)) (= (_ bv1 32) (select (select |c_#memory_int| .cse2) (_ bv0 32))) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32)))) is different from false [2021-10-13 07:24:43,945 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)))) (let ((.cse6 (select (select |c_#memory_$Pointer$.base| .cse1) (_ bv4 32)))) (and (forall ((v_DerPreprocessor_20 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_33 (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_34 (_ BitVec 32))) (or (= (select (select (let ((.cse0 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_34 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_34) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_22)))) (store .cse0 v_ULTIMATE.start_main_~t~0.base_33 (store (store (select .cse0 v_ULTIMATE.start_main_~t~0.base_33) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_20))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (= v_ULTIMATE.start_main_~t~0.base_33 v_ULTIMATE.start_main_~t~0.base_34) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_34)))))))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~p~0.base)) (_ bv1 1))) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (not (= .cse1 c_ULTIMATE.start_main_~p~0.base)) (= (select (select |c_#memory_$Pointer$.offset| .cse1) (_ bv4 32)) (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| .cse1))))) (_ bv1 1))) (forall ((v_ULTIMATE.start_main_~t~0.base_39 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (or (= (_ bv1 32) (let ((.cse2 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_39 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_39) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26)) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_39 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_39) (_ bv0 32) v_DerPreprocessor_25) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse2)) (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_39 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_39) (_ bv0 32) v_DerPreprocessor_27) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse2)))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_39))))) (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (let ((.cse3 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_20)) (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_19) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse3)) (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_21) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse3))) (_ bv1 32))) (forall ((v_ULTIMATE.start_main_~t~0.base_37 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (or (= (select (select (let ((.cse4 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_37 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_37) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_28)))) (store .cse4 v_ULTIMATE.start_main_~t~0.base_36 (store (store (select .cse4 v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (not (= (_ bv0 1) (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_37 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_36)))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_37))))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (forall ((v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_36))) (= (let ((.cse5 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_36 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26)) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_36 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) v_DerPreprocessor_25) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse5)) (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_36 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) v_DerPreprocessor_27) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse5))) (_ bv1 32)))) (not (= .cse1 .cse6)) (not (= c_ULTIMATE.start_main_~p~0.base .cse6)) (= (_ bv1 32) (select (select |c_#memory_int| .cse1) (_ bv0 32))) (forall ((v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_40 (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_40 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_36)))))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_40))) (= (select (select (let ((.cse7 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_40 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_40) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_28)))) (store .cse7 v_ULTIMATE.start_main_~t~0.base_36 (store (store (select .cse7 v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)))) (= (select (select |c_#memory_int| .cse6) (_ bv0 32)) (_ bv1 32)) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32))))) is different from false [2021-10-13 07:24:47,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:47,196 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-13 07:24:47,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 07:24:47,197 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 07:24:47,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:47,198 INFO L225 Difference]: With dead ends: 28 [2021-10-13 07:24:47,198 INFO L226 Difference]: Without dead ends: 26 [2021-10-13 07:24:47,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 90563.4ms TimeCoverageRelationStatistics Valid=263, Invalid=1319, Unknown=22, NotChecked=946, Total=2550 [2021-10-13 07:24:47,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-13 07:24:47,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-10-13 07:24:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 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) [2021-10-13 07:24:47,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-10-13 07:24:47,209 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2021-10-13 07:24:47,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:47,209 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-10-13 07:24:47,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:47,210 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-10-13 07:24:47,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 07:24:47,211 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:47,211 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2021-10-13 07:24:47,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-13 07:24:47,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:47,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-10-13 07:24:47,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:24:47,814 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:24:47,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:47,815 INFO L82 PathProgramCache]: Analyzing trace with hash 134691839, now seen corresponding path program 5 times [2021-10-13 07:24:47,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:24:47,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309340572] [2021-10-13 07:24:47,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 07:24:47,815 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:24:47,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:24:47,816 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:24:47,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 07:24:48,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 07:24:48,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:24:48,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-13 07:24:48,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:48,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:24:48,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:24:48,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:24:48,543 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:24:48,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-10-13 07:24:48,716 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:24:48,717 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-13 07:24:48,773 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 07:24:48,774 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 1 case distinctions, treesize of input 78 treesize of output 81 [2021-10-13 07:24:48,778 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:24:48,779 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 68 [2021-10-13 07:24:48,802 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 07:24:48,803 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 1 case distinctions, treesize of input 68 treesize of output 71 [2021-10-13 07:24:48,974 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-13 07:24:48,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 38 treesize of output 40 [2021-10-13 07:24:49,216 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:24:49,218 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-10-13 07:24:49,325 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-10-13 07:24:49,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 87 [2021-10-13 07:24:49,331 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:24:49,333 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-10-13 07:24:49,394 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-10-13 07:24:49,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 98 [2021-10-13 07:24:52,680 INFO L354 Elim1Store]: treesize reduction 118, result has 8.5 percent of original size [2021-10-13 07:24:52,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 166 treesize of output 100 [2021-10-13 07:24:52,735 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-10-13 07:24:52,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 51 [2021-10-13 07:24:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:52,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:55,364 INFO L354 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2021-10-13 07:24:55,364 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 52 treesize of output 51 [2021-10-13 07:24:55,798 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:24:55,799 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 241 [2021-10-13 07:24:55,802 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:24:55,803 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 243 [2021-10-13 07:24:59,133 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_40 (_ BitVec 32)) (v_DerPreprocessor_41 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_42 (_ BitVec 32))) (let ((.cse2 (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_42 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_42) (_ bv0 32) v_DerPreprocessor_41) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset))) (.cse5 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_42 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_42) (_ bv0 32) v_DerPreprocessor_40) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base))) (.cse6 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse3 (select (select .cse5 c_ULTIMATE.start_main_~p~0.base) .cse6)) (.cse4 (bvadd (select (select .cse2 c_ULTIMATE.start_main_~p~0.base) .cse6) (_ bv4 32)))) (let ((.cse0 (select (select .cse5 .cse3) .cse4)) (.cse1 (select (select .cse2 .cse3) .cse4))) (or (and (= .cse0 (_ bv0 32)) (= (_ bv0 32) .cse1)) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_42))) (and (= c_ULTIMATE.start_main_~p~0.base .cse0) (= c_ULTIMATE.start_main_~p~0.offset .cse1))))))) is different from false [2021-10-13 07:24:59,164 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:24:59,165 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 517 [2021-10-13 07:24:59,172 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:24:59,174 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 537 [2021-10-13 07:25:31,160 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_42 (_ BitVec 32)) (v_DerPreprocessor_43 (_ BitVec 32)) (v_DerPreprocessor_40 (_ BitVec 32)) (v_DerPreprocessor_41 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_43 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_42 (_ BitVec 32))) (let ((.cse5 (let ((.cse7 (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_43 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_43) (_ bv0 32) v_DerPreprocessor_42) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)))) (store .cse7 v_ULTIMATE.start_main_~t~0.base_42 (store (store (select .cse7 v_ULTIMATE.start_main_~t~0.base_42) (_ bv0 32) v_DerPreprocessor_41) (_ bv4 32) (_ bv0 32))))) (.cse2 (let ((.cse6 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_43 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_43) (_ bv0 32) v_DerPreprocessor_43) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)))) (store .cse6 v_ULTIMATE.start_main_~t~0.base_42 (store (store (select .cse6 v_ULTIMATE.start_main_~t~0.base_42) (_ bv0 32) v_DerPreprocessor_40) (_ bv4 32) v_ULTIMATE.start_main_~t~0.base_43))))) (let ((.cse3 (select (select .cse2 v_ULTIMATE.start_main_~t~0.base_43) (_ bv4 32))) (.cse4 (bvadd (_ bv4 32) (select (select .cse5 v_ULTIMATE.start_main_~t~0.base_43) (_ bv4 32))))) (let ((.cse1 (= (_ bv0 32) (select (select .cse5 .cse3) .cse4))) (.cse0 (select (select .cse2 .cse3) .cse4))) (or (and (= (_ bv0 32) .cse0) .cse1) (and .cse1 (= v_ULTIMATE.start_main_~t~0.base_43 .cse0)) (not (= (_ bv0 1) (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_43 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_42))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_43)))))))) is different from false [2021-10-13 07:25:31,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:25:31,257 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 1180238 treesize of output 1158676 [2021-10-13 07:25:42,033 WARN L207 SmtUtils]: Spent 10.77 s on a formula simplification. DAG size of input: 467 DAG size of output: 409 [2021-10-13 07:25:42,296 INFO L354 Elim1Store]: treesize reduction 30, result has 52.4 percent of original size [2021-10-13 07:25:42,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 224526 treesize of output 223758 [2021-10-13 07:26:01,875 WARN L207 SmtUtils]: Spent 19.57 s on a formula simplification. DAG size of input: 1090 DAG size of output: 1053 [2021-10-13 07:26:01,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:01,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309340572] [2021-10-13 07:26:01,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:26:01,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [959941865] [2021-10-13 07:26:01,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 07:26:01,884 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:01,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:26:01,886 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:26:01,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-13 07:26:02,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 07:26:02,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:26:02,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 07:26:02,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:02,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:26:02,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:26:02,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:26:02,853 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:26:02,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-10-13 07:26:02,976 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:02,977 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-10-13 07:26:03,021 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 07:26:03,022 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 1 case distinctions, treesize of input 76 treesize of output 79 [2021-10-13 07:26:03,026 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:03,027 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-10-13 07:26:03,051 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 07:26:03,051 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 1 case distinctions, treesize of input 66 treesize of output 69 [2021-10-13 07:26:03,161 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-13 07:26:03,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 44 treesize of output 46 [2021-10-13 07:26:03,260 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:03,261 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-10-13 07:26:03,330 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-10-13 07:26:03,330 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 87 [2021-10-13 07:26:03,338 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-10-13 07:26:03,338 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 1 case distinctions, treesize of input 104 treesize of output 95 [2021-10-13 07:26:03,377 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-10-13 07:26:03,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 91 [2021-10-13 07:26:04,340 INFO L354 Elim1Store]: treesize reduction 118, result has 8.5 percent of original size [2021-10-13 07:26:04,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 151 treesize of output 89 [2021-10-13 07:26:04,394 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-10-13 07:26:04,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 44 [2021-10-13 07:26:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:04,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:05,007 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:05,009 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 129 [2021-10-13 07:26:05,011 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:05,012 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-10-13 07:26:30,539 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:30,542 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 272 [2021-10-13 07:26:30,545 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:30,546 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 274 [2021-10-13 07:26:30,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_DerPreprocessor_48 [2021-10-13 07:26:30,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303275566] [2021-10-13 07:26:30,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 07:26:30,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:30,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:30,895 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:26:30,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 07:26:31,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 07:26:31,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:26:31,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 07:26:31,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:31,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:26:31,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:26:31,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:26:31,805 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:26:31,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-10-13 07:26:31,938 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:31,939 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-10-13 07:26:31,989 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 07:26:31,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 77 [2021-10-13 07:26:31,997 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 76 treesize of output 64 [2021-10-13 07:26:32,022 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 07:26:32,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 60 [2021-10-13 07:26:32,168 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-13 07:26:32,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 40 treesize of output 42 [2021-10-13 07:26:32,291 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:32,292 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-10-13 07:26:32,374 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-10-13 07:26:32,375 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 87 [2021-10-13 07:26:32,383 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-10-13 07:26:32,383 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 1 case distinctions, treesize of input 104 treesize of output 95 [2021-10-13 07:26:32,422 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-10-13 07:26:32,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 91 [2021-10-13 07:26:33,210 INFO L354 Elim1Store]: treesize reduction 118, result has 8.5 percent of original size [2021-10-13 07:26:33,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 151 treesize of output 89 [2021-10-13 07:26:33,261 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-10-13 07:26:33,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 44 [2021-10-13 07:26:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:33,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:33,450 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:33,451 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 129 [2021-10-13 07:26:33,453 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:33,454 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-10-13 07:27:00,483 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:27:00,484 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 272 [2021-10-13 07:27:00,487 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:27:00,488 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 274 [2021-10-13 07:27:00,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_DerPreprocessor_48 [2021-10-13 07:27:00,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:27:00,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 07:27:00,717 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 07:27:00,717 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 07:27:00,724 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:27:00,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-10-13 07:27:00,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:01,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-13 07:27:01,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:27:01,336 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:27:01,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:27:01 BoogieIcfgContainer [2021-10-13 07:27:01,354 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:27:01,354 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:27:01,355 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:27:01,355 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:27:01,355 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:19:47" (3/4) ... [2021-10-13 07:27:01,363 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:27:01,363 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:27:01,364 INFO L168 Benchmark]: Toolchain (without parser) took 435385.15 ms. Allocated memory was 60.8 MB in the beginning and 339.7 MB in the end (delta: 278.9 MB). Free memory was 40.0 MB in the beginning and 211.5 MB in the end (delta: -171.5 MB). Peak memory consumption was 106.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:01,364 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 60.8 MB. Free memory is still 41.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:27:01,365 INFO L168 Benchmark]: CACSL2BoogieTranslator took 582.73 ms. Allocated memory is still 60.8 MB. Free memory was 39.7 MB in the beginning and 38.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:01,365 INFO L168 Benchmark]: Boogie Procedure Inliner took 85.03 ms. Allocated memory is still 60.8 MB. Free memory was 38.1 MB in the beginning and 36.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:01,366 INFO L168 Benchmark]: Boogie Preprocessor took 34.95 ms. Allocated memory is still 60.8 MB. Free memory was 36.2 MB in the beginning and 34.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:27:01,366 INFO L168 Benchmark]: RCFGBuilder took 563.24 ms. Allocated memory is still 60.8 MB. Free memory was 34.6 MB in the beginning and 24.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:01,366 INFO L168 Benchmark]: TraceAbstraction took 434082.11 ms. Allocated memory was 86.0 MB in the beginning and 339.7 MB in the end (delta: 253.8 MB). Free memory was 68.5 MB in the beginning and 212.5 MB in the end (delta: -144.0 MB). Peak memory consumption was 107.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:01,367 INFO L168 Benchmark]: Witness Printer took 8.80 ms. Allocated memory is still 339.7 MB. Free memory was 212.5 MB in the beginning and 211.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:01,369 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 60.8 MB. Free memory is still 41.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 582.73 ms. Allocated memory is still 60.8 MB. Free memory was 39.7 MB in the beginning and 38.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 85.03 ms. Allocated memory is still 60.8 MB. Free memory was 38.1 MB in the beginning and 36.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.95 ms. Allocated memory is still 60.8 MB. Free memory was 36.2 MB in the beginning and 34.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 563.24 ms. Allocated memory is still 60.8 MB. Free memory was 34.6 MB in the beginning and 24.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 434082.11 ms. Allocated memory was 86.0 MB in the beginning and 339.7 MB in the end (delta: 253.8 MB). Free memory was 68.5 MB in the beginning and 212.5 MB in the end (delta: -144.0 MB). Peak memory consumption was 107.7 MB. Max. memory is 16.1 GB. * Witness Printer took 8.80 ms. Allocated memory is still 339.7 MB. Free memory was 212.5 MB in the beginning and 211.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 543]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L532] List t; [L533] List p = 0; [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) [L537] t->h = 1 [L538] t->n = p [L539] p = t [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) [L537] t->h = 1 [L538] t->n = p [L539] p = t [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) [L537] t->h = 1 [L538] t->n = p [L539] p = t [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 [L542] EXPR p->h [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n [L545] p = p->n [L541] COND TRUE p!=0 [L542] EXPR p->h [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n [L545] p = p->n [L541] COND TRUE p!=0 [L542] EXPR p->h [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n [L545] p = p->n [L541] COND TRUE p!=0 [L542] EXPR p->h [L542] COND TRUE p->h != 1 [L543] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 433967.7ms, OverallIterations: 8, TraceHistogramMax: 4, EmptinessCheckTime: 32.3ms, AutomataDifference: 30691.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 64 SDtfs, 42 SDslu, 243 SDs, 0 SdLazy, 479 SolverSat, 31 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 10502.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 429 GetRequests, 298 SyntacticMatches, 11 SemanticMatches, 120 ConstructedPredicates, 22 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 132447.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=7, InterpolantAutomatonStates: 50, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 52.2ms AutomataMinimizationTime, 7 MinimizatonAttempts, 11 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 178.8ms SsaConstructionTime, 745.8ms SatisfiabilityAnalysisTime, 262887.6ms InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 408 ConstructedInterpolants, 74 QuantifiedInterpolants, 10113 SizeOfPredicates, 118 NumberOfNonLiveVariables, 840 ConjunctsInSsa, 232 ConjunctsInUnsatCore, 30 InterpolantComputations, 6 PerfectInterpolantSequences, 55/248 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 07:27:01,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a69cadc-5825-4981-8d32-bfb0691e57ca/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...