./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init1_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init1_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8 --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 6f1eb5be2ecf3162a40e750dd6eacae17adaae5e4023d9d8d8174c2bd15bfaf3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:11:57,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:11:57,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:11:57,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:11:57,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:11:57,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:11:57,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:11:57,479 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:11:57,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:11:57,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:11:57,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:11:57,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:11:57,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:11:57,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:11:57,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:11:57,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:11:57,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:11:57,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:11:57,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:11:57,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:11:57,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:11:57,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:11:57,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:11:57,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:11:57,506 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:11:57,507 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:11:57,507 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:11:57,508 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:11:57,509 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:11:57,510 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:11:57,511 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:11:57,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:11:57,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:11:57,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:11:57,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:11:57,527 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:11:57,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:11:57,528 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:11:57,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:11:57,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:11:57,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:11:57,531 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:11:57,571 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:11:57,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:11:57,572 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:11:57,572 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:11:57,572 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:11:57,572 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:11:57,573 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:11:57,573 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:11:57,573 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:11:57,573 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:11:57,574 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:11:57,574 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:11:57,574 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:11:57,574 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:11:57,575 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:11:57,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:11:57,575 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:11:57,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:11:57,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:11:57,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:11:57,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:11:57,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:11:57,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:11:57,577 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:11:57,577 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:11:57,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:11:57,578 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:11:57,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:11:57,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:11:57,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:11:57,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:11:57,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:11:57,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:11:57,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:11:57,580 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:11:57,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:11:57,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:11:57,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:11:57,580 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:11:57,581 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_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f1eb5be2ecf3162a40e750dd6eacae17adaae5e4023d9d8d8174c2bd15bfaf3 [2021-11-07 02:11:57,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:11:57,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:11:57,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:11:57,890 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:11:57,891 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:11:57,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/array-examples/standard_init1_ground-1.i [2021-11-07 02:11:57,980 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/data/b0b09cd31/e8d6e3d5b2ae4f839187013154b3ab07/FLAG09c20f5c0 [2021-11-07 02:11:58,382 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:11:58,383 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/sv-benchmarks/c/array-examples/standard_init1_ground-1.i [2021-11-07 02:11:58,389 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/data/b0b09cd31/e8d6e3d5b2ae4f839187013154b3ab07/FLAG09c20f5c0 [2021-11-07 02:11:58,784 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/data/b0b09cd31/e8d6e3d5b2ae4f839187013154b3ab07 [2021-11-07 02:11:58,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:11:58,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:11:58,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:11:58,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:11:58,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:11:58,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:11:58" (1/1) ... [2021-11-07 02:11:58,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e4703d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:58, skipping insertion in model container [2021-11-07 02:11:58,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:11:58" (1/1) ... [2021-11-07 02:11:58,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:11:58,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:11:58,970 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_a9c4f534-da3f-4ded-be17-65bf8ec31623/sv-benchmarks/c/array-examples/standard_init1_ground-1.i[816,829] [2021-11-07 02:11:58,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:11:58,987 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:11:59,003 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_a9c4f534-da3f-4ded-be17-65bf8ec31623/sv-benchmarks/c/array-examples/standard_init1_ground-1.i[816,829] [2021-11-07 02:11:59,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:11:59,020 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:11:59,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:59 WrapperNode [2021-11-07 02:11:59,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:11:59,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:11:59,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:11:59,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:11:59,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:59" (1/1) ... [2021-11-07 02:11:59,036 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:59" (1/1) ... [2021-11-07 02:11:59,057 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:11:59,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:11:59,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:11:59,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:11:59,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:59" (1/1) ... [2021-11-07 02:11:59,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:59" (1/1) ... [2021-11-07 02:11:59,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:59" (1/1) ... [2021-11-07 02:11:59,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:59" (1/1) ... [2021-11-07 02:11:59,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:59" (1/1) ... [2021-11-07 02:11:59,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:59" (1/1) ... [2021-11-07 02:11:59,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:59" (1/1) ... [2021-11-07 02:11:59,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:11:59,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:11:59,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:11:59,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:11:59,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:59" (1/1) ... [2021-11-07 02:11:59,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:11:59,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:11:59,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:11:59,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:11:59,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 02:11:59,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:11:59,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 02:11:59,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:11:59,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:11:59,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 02:11:59,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:11:59,407 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:11:59,407 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-07 02:11:59,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:11:59 BoogieIcfgContainer [2021-11-07 02:11:59,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:11:59,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:11:59,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:11:59,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:11:59,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:11:58" (1/3) ... [2021-11-07 02:11:59,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b8faa7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:11:59, skipping insertion in model container [2021-11-07 02:11:59,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:59" (2/3) ... [2021-11-07 02:11:59,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b8faa7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:11:59, skipping insertion in model container [2021-11-07 02:11:59,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:11:59" (3/3) ... [2021-11-07 02:11:59,418 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init1_ground-1.i [2021-11-07 02:11:59,423 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:11:59,424 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:11:59,484 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:11:59,491 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:11:59,503 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 02:11:59,543 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:59,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 02:11:59,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:59,549 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 02:11:59,549 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:59,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:59,555 INFO L85 PathProgramCache]: Analyzing trace with hash 70716980, now seen corresponding path program 1 times [2021-11-07 02:11:59,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:11:59,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518868950] [2021-11-07 02:11:59,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:59,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:11:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:11:59,822 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:11:59,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518868950] [2021-11-07 02:11:59,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518868950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:59,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:59,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 02:11:59,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83975856] [2021-11-07 02:11:59,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:11:59,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:11:59,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:11:59,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:59,854 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) Second operand has 3 states, 3 states have (on average 1.6666666666666667) 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) [2021-11-07 02:11:59,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:59,886 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2021-11-07 02:11:59,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:11:59,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) 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 [2021-11-07 02:11:59,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:59,896 INFO L225 Difference]: With dead ends: 15 [2021-11-07 02:11:59,897 INFO L226 Difference]: Without dead ends: 8 [2021-11-07 02:11:59,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:59,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-07 02:11:59,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-07 02:11:59,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:59,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-07 02:11:59,932 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2021-11-07 02:11:59,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:59,932 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-07 02:11:59,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) 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) [2021-11-07 02:11:59,933 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-07 02:11:59,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 02:11:59,933 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:59,934 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 02:11:59,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 02:11:59,935 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:59,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:59,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2136169335, now seen corresponding path program 1 times [2021-11-07 02:11:59,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:11:59,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947219207] [2021-11-07 02:11:59,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:59,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:11:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:00,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:12:00,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947219207] [2021-11-07 02:12:00,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947219207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:12:00,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077796188] [2021-11-07 02:12:00,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:00,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:00,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:12:00,031 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:12:00,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 02:12:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:00,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:12:00,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:00,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:00,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077796188] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:00,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1211862267] [2021-11-07 02:12:00,222 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 02:12:00,223 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 02:12:00,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 02:12:00,244 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 02:12:00,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 02:12:00,296 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,303 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:00,305 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,306 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:12:00,311 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:00,312 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,313 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 02:12:00,326 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-07 02:12:00,353 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_27|]} [2021-11-07 02:12:00,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:00,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:00,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:00,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 02:12:00,397 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,397 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:00,398 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,399 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:00,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:00,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:00,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:00,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:00,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:00,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:00,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:00,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:00,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:00,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:00,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:00,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 02:12:00,459 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,462 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:00,463 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,463 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:00,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:00,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:00,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,494 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,499 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-07 02:12:00,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:12:00,500 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-07 02:12:00,512 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.5 percent of original size [2021-11-07 02:12:00,520 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:00,521 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,522 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:00,531 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-11-07 02:12:00,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:00,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:00,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-07 02:12:00,559 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,562 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-07 02:12:00,563 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,565 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-07 02:12:00,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:00,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:00,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,590 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,593 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 101 [2021-11-07 02:12:00,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:12:00,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:105, output treesize:101 [2021-11-07 02:12:00,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:00,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:00,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:00,744 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,764 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:00,767 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,771 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:00,772 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,773 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-07 02:12:00,776 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:00,777 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-11-07 02:12:00,786 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 236 [2021-11-07 02:12:00,787 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:00,791 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,795 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 217 [2021-11-07 02:12:00,799 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 267 [2021-11-07 02:12:00,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:00,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:00,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:00,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 45 [2021-11-07 02:12:00,855 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,861 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-07 02:12:00,862 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,864 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-07 02:12:00,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:00,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:00,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:00,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2021-11-07 02:12:00,899 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,901 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-07 02:12:00,903 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,904 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-07 02:12:00,904 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:00,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:00,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:00,974 INFO L180 QuantifierPusher]: treesize reduction 82, result has 74.4 percent of original size [2021-11-07 02:12:00,981 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-07 02:12:00,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-07 02:12:00,985 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:328, output treesize:238 [2021-11-07 02:12:00,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:01,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:01,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:01,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:01,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:01,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:01,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:01,073 INFO L180 QuantifierPusher]: treesize reduction 30, result has 64.7 percent of original size [2021-11-07 02:12:01,076 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:01,083 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:01,084 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:01,085 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-07 02:12:01,095 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 16 treesize of output 12 [2021-11-07 02:12:01,096 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:01,097 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:12:01,097 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:01,098 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:12:01,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:01,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:01,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:01,107 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:01,109 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-11-07 02:12:01,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:12:01,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2021-11-07 02:12:01,120 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 02:12:01,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:12:01,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:12:01,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-07 02:12:01,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133009183] [2021-11-07 02:12:01,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:12:01,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:12:01,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:12:01,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:12:01,480 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 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) [2021-11-07 02:12:01,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:01,496 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2021-11-07 02:12:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:12:01,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 02:12:01,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:01,497 INFO L225 Difference]: With dead ends: 16 [2021-11-07 02:12:01,497 INFO L226 Difference]: Without dead ends: 11 [2021-11-07 02:12:01,498 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:12:01,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-07 02:12:01,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-07 02:12:01,500 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) [2021-11-07 02:12:01,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-07 02:12:01,501 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-11-07 02:12:01,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:01,501 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-07 02:12:01,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 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) [2021-11-07 02:12:01,501 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-07 02:12:01,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 02:12:01,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:01,502 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2021-11-07 02:12:01,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:01,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:01,723 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:01,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:01,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1075084148, now seen corresponding path program 2 times [2021-11-07 02:12:01,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:12:01,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664784531] [2021-11-07 02:12:01,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:01,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:12:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:01,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:12:01,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664784531] [2021-11-07 02:12:01,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664784531] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:12:01,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569701008] [2021-11-07 02:12:01,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:12:01,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:01,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:12:01,827 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:12:01,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 02:12:01,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 02:12:01,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:12:01,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:12:01,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:01,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:01,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:02,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569701008] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:02,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1691887657] [2021-11-07 02:12:02,014 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 02:12:02,014 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 02:12:02,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 02:12:02,015 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 02:12:02,015 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 02:12:02,020 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,021 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:02,021 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,022 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:12:02,023 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:02,023 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,024 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 02:12:02,026 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-07 02:12:02,030 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_28|]} [2021-11-07 02:12:02,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:02,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:02,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:02,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 02:12:02,040 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,041 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:02,041 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,042 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:02,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:02,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:02,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:02,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:02,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:02,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:02,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:02,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:02,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:02,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:02,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:02,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 02:12:02,065 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,068 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:02,068 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,069 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:02,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:02,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:02,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,075 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,077 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-07 02:12:02,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:12:02,077 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-07 02:12:02,081 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.5 percent of original size [2021-11-07 02:12:02,084 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:02,084 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,085 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-07 02:12:02,087 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-11-07 02:12:02,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:02,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:02,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2021-11-07 02:12:02,098 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,100 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-07 02:12:02,101 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,101 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-07 02:12:02,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:02,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:02,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,108 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,109 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-11-07 02:12:02,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:12:02,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:112, output treesize:108 [2021-11-07 02:12:02,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:02,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:02,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:02,157 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,165 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:02,168 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,169 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:02,170 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,171 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-07 02:12:02,172 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:02,172 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,173 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-07 02:12:02,176 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 241 [2021-11-07 02:12:02,177 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:02,180 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,182 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 222 [2021-11-07 02:12:02,186 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 272 [2021-11-07 02:12:02,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:02,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:02,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:02,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 50 [2021-11-07 02:12:02,213 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,215 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-07 02:12:02,216 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,217 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-07 02:12:02,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:02,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:02,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:02,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2021-11-07 02:12:02,233 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,234 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-07 02:12:02,235 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,236 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-07 02:12:02,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:02,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:02,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,270 INFO L180 QuantifierPusher]: treesize reduction 82, result has 74.8 percent of original size [2021-11-07 02:12:02,274 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 243 [2021-11-07 02:12:02,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-07 02:12:02,275 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:333, output treesize:243 [2021-11-07 02:12:02,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:02,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:02,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:02,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:02,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:02,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:02,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:02,321 INFO L180 QuantifierPusher]: treesize reduction 30, result has 64.7 percent of original size [2021-11-07 02:12:02,323 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:02,324 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,324 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:02,325 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-07 02:12:02,331 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 16 treesize of output 12 [2021-11-07 02:12:02,331 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,332 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:12:02,332 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,333 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:12:02,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:02,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:02,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,344 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:02,344 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-11-07 02:12:02,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:12:02,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2021-11-07 02:12:02,352 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 02:12:02,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:12:02,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:12:02,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-07 02:12:02,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339727722] [2021-11-07 02:12:02,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 02:12:02,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:12:02,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 02:12:02,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-11-07 02:12:02,669 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:02,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:02,693 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2021-11-07 02:12:02,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 02:12:02,694 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-07 02:12:02,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:02,694 INFO L225 Difference]: With dead ends: 22 [2021-11-07 02:12:02,694 INFO L226 Difference]: Without dead ends: 17 [2021-11-07 02:12:02,695 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-11-07 02:12:02,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-07 02:12:02,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-07 02:12:02,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:02,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-07 02:12:02,699 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2021-11-07 02:12:02,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:02,699 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-07 02:12:02,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:02,699 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-07 02:12:02,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 02:12:02,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:02,700 INFO L513 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2021-11-07 02:12:02,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:02,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 02:12:02,923 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:02,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:02,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1341689004, now seen corresponding path program 3 times [2021-11-07 02:12:02,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:12:02,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652838210] [2021-11-07 02:12:02,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:02,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:12:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:03,059 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:12:03,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652838210] [2021-11-07 02:12:03,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652838210] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:12:03,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420885250] [2021-11-07 02:12:03,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:12:03,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:03,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:12:03,062 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:12:03,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 02:12:03,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:12:03,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:12:03,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:12:03,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:03,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:03,411 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:03,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420885250] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:03,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [450134298] [2021-11-07 02:12:03,415 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 02:12:03,415 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 02:12:03,416 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 02:12:03,416 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 02:12:03,416 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 02:12:03,424 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,425 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:03,426 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,426 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:12:03,427 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:03,428 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,429 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 02:12:03,432 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-07 02:12:03,435 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 21=[|v_#valid_29|]} [2021-11-07 02:12:03,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:03,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:03,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:03,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 02:12:03,445 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,446 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:03,447 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,447 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:03,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:03,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:03,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:03,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:03,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:03,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:03,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:03,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:03,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:03,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:03,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:03,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 02:12:03,473 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,476 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:03,477 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,479 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:03,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:03,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:03,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,486 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,487 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-07 02:12:03,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:12:03,488 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-07 02:12:03,492 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.5 percent of original size [2021-11-07 02:12:03,500 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:03,501 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,502 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:03,503 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-11-07 02:12:03,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:03,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:03,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-07 02:12:03,515 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,517 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-07 02:12:03,518 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,518 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-07 02:12:03,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:03,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:03,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,524 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,526 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 101 [2021-11-07 02:12:03,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:12:03,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:105, output treesize:101 [2021-11-07 02:12:03,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:03,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:03,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:03,599 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,611 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:03,614 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,616 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:03,617 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,618 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-11-07 02:12:03,619 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:03,620 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,620 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-07 02:12:03,624 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 236 [2021-11-07 02:12:03,625 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:03,629 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,633 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 217 [2021-11-07 02:12:03,636 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 267 [2021-11-07 02:12:03,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:03,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:03,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2021-11-07 02:12:03,660 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,663 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-07 02:12:03,663 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,664 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-07 02:12:03,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:03,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:03,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:03,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:03,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 45 [2021-11-07 02:12:03,683 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,688 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-07 02:12:03,689 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,689 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-07 02:12:03,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:03,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:03,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,726 INFO L180 QuantifierPusher]: treesize reduction 82, result has 74.4 percent of original size [2021-11-07 02:12:03,730 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-07 02:12:03,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-07 02:12:03,731 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:328, output treesize:238 [2021-11-07 02:12:03,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:03,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:03,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:03,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:03,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:03,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:03,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:03,786 INFO L180 QuantifierPusher]: treesize reduction 30, result has 64.7 percent of original size [2021-11-07 02:12:03,788 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:03,789 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,789 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:03,790 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-07 02:12:03,796 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 16 treesize of output 12 [2021-11-07 02:12:03,796 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,797 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:12:03,797 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,798 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:12:03,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:03,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:03,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,801 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:03,802 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-11-07 02:12:03,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:12:03,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2021-11-07 02:12:03,810 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 02:12:04,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:12:04,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:12:04,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-07 02:12:04,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491672392] [2021-11-07 02:12:04,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 02:12:04,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:12:04,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 02:12:04,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2021-11-07 02:12:04,142 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:04,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:04,181 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2021-11-07 02:12:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 02:12:04,181 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 02:12:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:04,182 INFO L225 Difference]: With dead ends: 34 [2021-11-07 02:12:04,182 INFO L226 Difference]: Without dead ends: 29 [2021-11-07 02:12:04,183 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2021-11-07 02:12:04,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-07 02:12:04,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-07 02:12:04,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:04,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-07 02:12:04,188 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2021-11-07 02:12:04,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:04,188 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-07 02:12:04,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:04,189 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-07 02:12:04,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 02:12:04,189 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:04,190 INFO L513 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2021-11-07 02:12:04,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:04,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:04,403 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:04,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:04,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2114508012, now seen corresponding path program 4 times [2021-11-07 02:12:04,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:12:04,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345160399] [2021-11-07 02:12:04,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:04,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:12:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:04,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:12:04,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345160399] [2021-11-07 02:12:04,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345160399] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:12:04,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385566237] [2021-11-07 02:12:04,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 02:12:04,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:04,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:12:04,803 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:12:04,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 02:12:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:04,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 02:12:04,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:05,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:05,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385566237] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:05,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1760181379] [2021-11-07 02:12:05,907 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 02:12:05,908 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 02:12:05,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 02:12:05,908 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 02:12:05,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 02:12:05,913 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:05,914 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:05,914 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:05,915 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 02:12:05,916 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:05,916 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:05,917 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:12:05,918 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-07 02:12:05,921 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_15|], 21=[|v_#valid_30|]} [2021-11-07 02:12:05,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:05,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:05,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:05,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 02:12:05,934 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:05,935 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:05,935 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:05,936 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:05,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:05,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:05,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:05,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:05,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:05,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:05,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:05,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:05,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:05,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:05,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:05,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:05,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 02:12:05,959 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:05,961 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:05,962 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:05,962 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:05,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:05,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:05,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:05,968 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:05,970 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-07 02:12:05,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:12:05,971 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-07 02:12:05,974 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.5 percent of original size [2021-11-07 02:12:05,975 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:05,976 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:05,977 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:05,978 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-11-07 02:12:05,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:05,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:06,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-07 02:12:06,001 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,003 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-07 02:12:06,004 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,004 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-07 02:12:06,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:06,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,012 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,014 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 101 [2021-11-07 02:12:06,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:12:06,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:105, output treesize:101 [2021-11-07 02:12:06,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,064 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,071 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:06,074 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,076 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:06,077 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,077 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-11-07 02:12:06,078 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:06,079 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,080 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-07 02:12:06,083 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 236 [2021-11-07 02:12:06,084 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:06,087 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,090 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 217 [2021-11-07 02:12:06,094 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 267 [2021-11-07 02:12:06,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:06,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:06,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:06,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 45 [2021-11-07 02:12:06,123 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,125 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-07 02:12:06,126 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,127 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-07 02:12:06,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:06,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:06,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:06,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2021-11-07 02:12:06,144 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,146 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-07 02:12:06,147 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,148 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-07 02:12:06,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:06,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,179 INFO L180 QuantifierPusher]: treesize reduction 82, result has 74.4 percent of original size [2021-11-07 02:12:06,182 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-07 02:12:06,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-07 02:12:06,183 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:328, output treesize:238 [2021-11-07 02:12:06,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,221 INFO L180 QuantifierPusher]: treesize reduction 30, result has 64.7 percent of original size [2021-11-07 02:12:06,222 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:06,223 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,223 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:06,224 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-07 02:12:06,229 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 16 treesize of output 12 [2021-11-07 02:12:06,229 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,230 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:12:06,230 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,231 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:12:06,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:06,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,234 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,235 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-11-07 02:12:06,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:12:06,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2021-11-07 02:12:06,241 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 02:12:06,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:12:06,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:12:06,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2021-11-07 02:12:06,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074556495] [2021-11-07 02:12:06,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-07 02:12:06,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:12:06,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-07 02:12:06,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 02:12:06,633 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:06,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:06,725 INFO L93 Difference]: Finished difference Result 58 states and 83 transitions. [2021-11-07 02:12:06,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 02:12:06,726 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 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 27 [2021-11-07 02:12:06,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:06,728 INFO L225 Difference]: With dead ends: 58 [2021-11-07 02:12:06,728 INFO L226 Difference]: Without dead ends: 53 [2021-11-07 02:12:06,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 02:12:06,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-07 02:12:06,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-07 02:12:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:06,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-11-07 02:12:06,750 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2021-11-07 02:12:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:06,750 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-11-07 02:12:06,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:06,752 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-11-07 02:12:06,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 02:12:06,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:06,754 INFO L513 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2021-11-07 02:12:06,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:06,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-07 02:12:06,974 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:06,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:06,974 INFO L85 PathProgramCache]: Analyzing trace with hash -779765100, now seen corresponding path program 5 times [2021-11-07 02:12:06,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:12:06,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44683328] [2021-11-07 02:12:06,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:06,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:12:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:08,237 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:12:08,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44683328] [2021-11-07 02:12:08,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44683328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:12:08,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574058466] [2021-11-07 02:12:08,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:12:08,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:08,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:12:08,239 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:12:08,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 02:13:57,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-07 02:13:57,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:57,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 02:13:57,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:57,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:00,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574058466] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:14:00,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2065459005] [2021-11-07 02:14:00,440 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 02:14:00,440 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 02:14:00,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 02:14:00,441 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 02:14:00,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 02:14:00,446 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,447 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:14:00,448 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,448 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 02:14:00,448 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:14:00,449 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,449 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:14:00,450 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-07 02:14:00,453 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_16|], 21=[|v_#valid_31|]} [2021-11-07 02:14:00,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:00,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:00,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:00,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 02:14:00,463 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,463 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:14:00,463 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,464 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:14:00,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:14:00,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:00,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:00,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:00,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:00,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:00,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:00,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:00,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:00,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:00,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:00,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 02:14:00,484 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,492 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:14:00,493 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,493 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:14:00,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:14:00,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:00,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,498 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,499 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-07 02:14:00,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:14:00,500 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-07 02:14:00,503 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.5 percent of original size [2021-11-07 02:14:00,504 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:14:00,505 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,505 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:14:00,506 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-11-07 02:14:00,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:00,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:00,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-07 02:14:00,516 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,517 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-07 02:14:00,517 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,518 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-07 02:14:00,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:14:00,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:00,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,523 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,524 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 101 [2021-11-07 02:14:00,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:14:00,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:105, output treesize:101 [2021-11-07 02:14:00,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:00,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:00,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:00,557 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,567 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:14:00,569 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,570 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:14:00,570 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,571 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-11-07 02:14:00,571 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:14:00,572 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,573 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-07 02:14:00,575 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 236 [2021-11-07 02:14:00,576 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:14:00,577 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,579 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 217 [2021-11-07 02:14:00,582 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 267 [2021-11-07 02:14:00,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:00,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:00,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:00,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 45 [2021-11-07 02:14:00,604 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,606 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-07 02:14:00,606 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,607 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-07 02:14:00,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:14:00,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:00,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:00,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2021-11-07 02:14:00,621 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,622 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-07 02:14:00,622 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,623 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-07 02:14:00,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:14:00,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:00,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,649 INFO L180 QuantifierPusher]: treesize reduction 82, result has 74.4 percent of original size [2021-11-07 02:14:00,651 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-07 02:14:00,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-07 02:14:00,652 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:328, output treesize:238 [2021-11-07 02:14:00,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:00,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:00,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:00,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:00,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:00,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:00,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:00,686 INFO L180 QuantifierPusher]: treesize reduction 30, result has 64.7 percent of original size [2021-11-07 02:14:00,687 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:14:00,688 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,688 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:14:00,689 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-07 02:14:00,693 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 16 treesize of output 12 [2021-11-07 02:14:00,694 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,694 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:14:00,695 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,695 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:14:00,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:14:00,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:00,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,698 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:00,698 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-11-07 02:14:00,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:14:00,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2021-11-07 02:14:00,706 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 02:14:01,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:14:01,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:14:01,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2021-11-07 02:14:01,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352766520] [2021-11-07 02:14:01,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-07 02:14:01,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:14:01,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-07 02:14:01,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4670, Invalid=5430, Unknown=0, NotChecked=0, Total=10100 [2021-11-07 02:14:01,133 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:01,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:01,339 INFO L93 Difference]: Finished difference Result 106 states and 155 transitions. [2021-11-07 02:14:01,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-07 02:14:01,342 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 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 51 [2021-11-07 02:14:01,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:01,343 INFO L225 Difference]: With dead ends: 106 [2021-11-07 02:14:01,344 INFO L226 Difference]: Without dead ends: 101 [2021-11-07 02:14:01,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4670, Invalid=5430, Unknown=0, NotChecked=0, Total=10100 [2021-11-07 02:14:01,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-07 02:14:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-11-07 02:14:01,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:01,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-11-07 02:14:01,359 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 51 [2021-11-07 02:14:01,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:01,360 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-11-07 02:14:01,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:01,360 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-11-07 02:14:01,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 02:14:01,364 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:01,364 INFO L513 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1] [2021-11-07 02:14:01,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:01,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-11-07 02:14:01,565 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:01,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:01,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1201625492, now seen corresponding path program 6 times [2021-11-07 02:14:01,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:14:01,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478993868] [2021-11-07 02:14:01,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:01,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:14:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:04,829 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:14:04,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478993868] [2021-11-07 02:14:04,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478993868] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:14:04,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307933433] [2021-11-07 02:14:04,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:14:04,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:14:04,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:14:04,840 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:14:04,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 02:14:05,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:14:05,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:14:05,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-07 02:14:05,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:05,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:14,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307933433] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:14:14,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1271115516] [2021-11-07 02:14:14,474 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 02:14:14,474 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 02:14:14,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 02:14:14,475 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 02:14:14,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 02:14:14,481 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,482 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:14:14,482 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,483 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 02:14:14,483 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:14:14,483 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,484 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:14:14,484 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-07 02:14:14,489 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_17|], 21=[|v_#valid_32|]} [2021-11-07 02:14:14,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:14,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:14,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:14,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 02:14:14,502 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,503 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:14:14,503 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,504 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:14:14,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:14:14,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:14,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:14,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:14,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:14,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:14,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:14,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:14,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:14,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:14,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:14,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 02:14:14,523 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,525 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:14:14,525 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,526 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:14:14,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:14:14,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:14,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,531 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,532 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-07 02:14:14,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:14:14,533 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-07 02:14:14,535 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.5 percent of original size [2021-11-07 02:14:14,537 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:14:14,537 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,538 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:14:14,539 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-11-07 02:14:14,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:14,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:14,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-07 02:14:14,549 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,550 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-07 02:14:14,551 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,551 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-07 02:14:14,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:14:14,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:14,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,556 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,558 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 101 [2021-11-07 02:14:14,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:14:14,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:105, output treesize:101 [2021-11-07 02:14:14,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:14,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:14,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:14,589 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,595 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:14:14,597 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,598 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:14:14,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,599 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-07 02:14:14,600 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:14:14,600 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,601 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-11-07 02:14:14,603 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 236 [2021-11-07 02:14:14,603 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:14:14,605 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,607 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 217 [2021-11-07 02:14:14,610 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 267 [2021-11-07 02:14:14,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:14,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:14,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2021-11-07 02:14:14,627 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,629 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-07 02:14:14,629 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,630 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-07 02:14:14,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:14:14,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:14,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:14,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:14,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 45 [2021-11-07 02:14:14,644 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,646 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-07 02:14:14,647 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,647 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-07 02:14:14,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:14:14,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:14,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,671 INFO L180 QuantifierPusher]: treesize reduction 82, result has 74.4 percent of original size [2021-11-07 02:14:14,673 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-07 02:14:14,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-07 02:14:14,674 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:328, output treesize:238 [2021-11-07 02:14:14,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:14,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:14,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:14,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:14,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:14,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:14,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:14,706 INFO L180 QuantifierPusher]: treesize reduction 30, result has 64.7 percent of original size [2021-11-07 02:14:14,708 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:14:14,708 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,709 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:14:14,709 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-07 02:14:14,714 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 16 treesize of output 12 [2021-11-07 02:14:14,714 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,715 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:14:14,715 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,715 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:14:14,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:14:14,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:14:14,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,718 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:14:14,719 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-11-07 02:14:14,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:14:14,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2021-11-07 02:14:14,725 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 02:14:15,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:14:15,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:14:15,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2021-11-07 02:14:15,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503877793] [2021-11-07 02:14:15,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-11-07 02:14:15,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:14:15,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-11-07 02:14:15,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18542, Invalid=20070, Unknown=0, NotChecked=0, Total=38612 [2021-11-07 02:14:15,265 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:15,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:15,871 INFO L93 Difference]: Finished difference Result 202 states and 299 transitions. [2021-11-07 02:14:15,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-07 02:14:15,871 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-07 02:14:15,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:15,874 INFO L225 Difference]: With dead ends: 202 [2021-11-07 02:14:15,874 INFO L226 Difference]: Without dead ends: 197 [2021-11-07 02:14:15,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=18542, Invalid=20070, Unknown=0, NotChecked=0, Total=38612 [2021-11-07 02:14:15,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-07 02:14:15,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-11-07 02:14:15,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2021-11-07 02:14:15,896 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 99 [2021-11-07 02:14:15,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:15,897 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2021-11-07 02:14:15,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:15,897 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2021-11-07 02:14:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-07 02:14:15,908 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:15,908 INFO L513 BasicCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1] [2021-11-07 02:14:15,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:16,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:14:16,115 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:16,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:16,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1849387116, now seen corresponding path program 7 times [2021-11-07 02:14:16,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:14:16,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032088188] [2021-11-07 02:14:16,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:16,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:14:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:28,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:14:28,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032088188] [2021-11-07 02:14:28,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032088188] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:14:28,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55199019] [2021-11-07 02:14:28,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 02:14:28,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:14:28,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:14:28,475 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:14:28,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 02:14:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:28,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-07 02:14:28,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:29,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:05,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55199019] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:15:05,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [979247451] [2021-11-07 02:15:05,482 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 02:15:05,482 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 02:15:05,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 02:15:05,483 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 02:15:05,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 02:15:05,487 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,488 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:15:05,488 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,489 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 02:15:05,489 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:15:05,489 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,489 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:15:05,490 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-07 02:15:05,499 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_18|], 21=[|v_#valid_33|]} [2021-11-07 02:15:05,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:05,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:05,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:05,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 02:15:05,508 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,508 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:15:05,509 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,509 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:15:05,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:15:05,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:15:05,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:05,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:05,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:05,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:05,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:05,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:05,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:05,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:05,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:05,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 02:15:05,532 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,535 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:15:05,536 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,536 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:15:05,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:15:05,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:15:05,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,541 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,545 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-07 02:15:05,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:15:05,545 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-07 02:15:05,548 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.5 percent of original size [2021-11-07 02:15:05,550 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:15:05,551 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,551 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-07 02:15:05,553 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-11-07 02:15:05,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:05,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:05,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2021-11-07 02:15:05,563 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,564 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-07 02:15:05,564 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,565 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-07 02:15:05,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:15:05,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:15:05,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,569 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,571 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-11-07 02:15:05,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:15:05,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:112, output treesize:108 [2021-11-07 02:15:05,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:15:05,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:15:05,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:15:05,601 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,607 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:15:05,609 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,610 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:15:05,611 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,612 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-07 02:15:05,612 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:15:05,613 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,613 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-07 02:15:05,616 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 241 [2021-11-07 02:15:05,617 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:15:05,619 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,621 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 222 [2021-11-07 02:15:05,623 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 272 [2021-11-07 02:15:05,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:05,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:05,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2021-11-07 02:15:05,642 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,642 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-07 02:15:05,643 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,643 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-07 02:15:05,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:15:05,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:05,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:05,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:05,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 50 [2021-11-07 02:15:05,656 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,658 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-07 02:15:05,658 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,659 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-07 02:15:05,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:15:05,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:15:05,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,680 INFO L180 QuantifierPusher]: treesize reduction 82, result has 74.8 percent of original size [2021-11-07 02:15:05,682 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 243 [2021-11-07 02:15:05,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-07 02:15:05,683 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:333, output treesize:243 [2021-11-07 02:15:05,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:15:05,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:15:05,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:15:05,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:15:05,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:15:05,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:15:05,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:15:05,714 INFO L180 QuantifierPusher]: treesize reduction 30, result has 64.7 percent of original size [2021-11-07 02:15:05,716 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:15:05,716 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,716 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:15:05,717 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-07 02:15:05,721 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 16 treesize of output 12 [2021-11-07 02:15:05,722 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,722 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:15:05,722 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,723 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:15:05,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:15:05,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:15:05,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,725 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:05,726 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-11-07 02:15:05,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:15:05,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2021-11-07 02:15:05,732 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 02:15:06,487 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:15:06,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:15:06,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2021-11-07 02:15:06,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670016602] [2021-11-07 02:15:06,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2021-11-07 02:15:06,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:15:06,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2021-11-07 02:15:06,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73934, Invalid=76998, Unknown=0, NotChecked=0, Total=150932 [2021-11-07 02:15:06,524 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:08,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:08,641 INFO L93 Difference]: Finished difference Result 394 states and 587 transitions. [2021-11-07 02:15:08,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-07 02:15:08,643 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 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 195 [2021-11-07 02:15:08,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:08,646 INFO L225 Difference]: With dead ends: 394 [2021-11-07 02:15:08,646 INFO L226 Difference]: Without dead ends: 389 [2021-11-07 02:15:08,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3052 ImplicationChecksByTransitivity, 47.4s TimeCoverageRelationStatistics Valid=73934, Invalid=76998, Unknown=0, NotChecked=0, Total=150932 [2021-11-07 02:15:08,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-07 02:15:08,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2021-11-07 02:15:08,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.0051546391752577) internal successors, (390), 388 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:08,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 390 transitions. [2021-11-07 02:15:08,714 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 390 transitions. Word has length 195 [2021-11-07 02:15:08,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:08,715 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 390 transitions. [2021-11-07 02:15:08,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:08,716 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 390 transitions. [2021-11-07 02:15:08,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-11-07 02:15:08,726 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:08,726 INFO L513 BasicCegarLoop]: trace histogram [382, 1, 1, 1, 1, 1] [2021-11-07 02:15:08,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:08,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:15:08,951 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:15:08,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:08,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1378413676, now seen corresponding path program 8 times [2021-11-07 02:15:08,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:15:08,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882033681] [2021-11-07 02:15:08,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:08,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:15:09,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:57,245 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:15:57,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882033681] [2021-11-07 02:15:57,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882033681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:15:57,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216396895] [2021-11-07 02:15:57,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:15:57,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:15:57,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:15:57,263 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:15:57,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c4f534-da3f-4ded-be17-65bf8ec31623/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process