./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/vogal-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/vogal-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7 --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 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:51:13,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:51:13,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:51:13,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:51:13,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:51:13,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:51:13,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:51:13,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:51:13,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:51:13,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:51:13,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:51:13,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:51:13,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:51:13,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:51:13,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:51:13,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:51:13,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:51:13,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:51:13,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:51:13,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:51:13,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:51:13,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:51:13,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:51:13,529 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:51:13,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:51:13,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:51:13,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:51:13,536 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:51:13,536 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:51:13,538 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:51:13,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:51:13,539 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:51:13,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:51:13,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:51:13,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:51:13,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:51:13,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:51:13,546 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:51:13,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:51:13,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:51:13,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:51:13,548 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 17:51:13,594 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:51:13,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:51:13,595 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:51:13,595 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:51:13,596 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:51:13,596 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:51:13,596 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:51:13,596 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:51:13,597 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:51:13,597 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:51:13,598 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:51:13,598 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:51:13,598 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:51:13,598 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:51:13,599 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:51:13,599 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:51:13,599 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:51:13,599 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:51:13,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:51:13,600 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:51:13,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:51:13,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:51:13,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:51:13,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:51:13,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:51:13,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:51:13,603 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:51:13,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:51:13,603 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:51:13,604 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:51:13,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:51:13,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:51:13,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:51:13,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:51:13,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:51:13,605 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:51:13,605 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:51:13,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:51:13,606 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:51:13,606 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:51:13,606 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:51:13,606 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_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e [2021-11-25 17:51:13,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:51:13,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:51:13,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:51:13,996 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:51:13,997 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:51:13,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/loops/vogal-1.i [2021-11-25 17:51:14,054 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/data/ad27a3f1a/0af89f11a80545ae986de6c81ab98bd4/FLAG110513ce3 [2021-11-25 17:51:14,489 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:51:14,490 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/sv-benchmarks/c/loops/vogal-1.i [2021-11-25 17:51:14,502 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/data/ad27a3f1a/0af89f11a80545ae986de6c81ab98bd4/FLAG110513ce3 [2021-11-25 17:51:14,856 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/data/ad27a3f1a/0af89f11a80545ae986de6c81ab98bd4 [2021-11-25 17:51:14,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:51:14,860 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:51:14,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:51:14,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:51:14,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:51:14,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:51:14" (1/1) ... [2021-11-25 17:51:14,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fdcdcfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:14, skipping insertion in model container [2021-11-25 17:51:14,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:51:14" (1/1) ... [2021-11-25 17:51:14,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:51:14,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:51:15,083 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/sv-benchmarks/c/loops/vogal-1.i[895,908] [2021-11-25 17:51:15,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:51:15,118 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:51:15,130 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/sv-benchmarks/c/loops/vogal-1.i[895,908] [2021-11-25 17:51:15,144 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:51:15,156 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:51:15,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:15 WrapperNode [2021-11-25 17:51:15,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:51:15,158 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:51:15,158 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:51:15,158 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:51:15,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:15" (1/1) ... [2021-11-25 17:51:15,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:15" (1/1) ... [2021-11-25 17:51:15,200 INFO L137 Inliner]: procedures = 17, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 133 [2021-11-25 17:51:15,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:51:15,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:51:15,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:51:15,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:51:15,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:15" (1/1) ... [2021-11-25 17:51:15,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:15" (1/1) ... [2021-11-25 17:51:15,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:15" (1/1) ... [2021-11-25 17:51:15,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:15" (1/1) ... [2021-11-25 17:51:15,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:15" (1/1) ... [2021-11-25 17:51:15,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:15" (1/1) ... [2021-11-25 17:51:15,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:15" (1/1) ... [2021-11-25 17:51:15,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:51:15,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:51:15,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:51:15,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:51:15,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:15" (1/1) ... [2021-11-25 17:51:15,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:51:15,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:15,266 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:51:15,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:51:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:51:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:51:15,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 17:51:15,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 17:51:15,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:51:15,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:51:15,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 17:51:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 17:51:15,384 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:51:15,385 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:51:15,619 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:51:15,697 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:51:15,697 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-25 17:51:15,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:51:15 BoogieIcfgContainer [2021-11-25 17:51:15,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:51:15,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:51:15,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:51:15,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:51:15,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:51:14" (1/3) ... [2021-11-25 17:51:15,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a11dadb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:51:15, skipping insertion in model container [2021-11-25 17:51:15,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:15" (2/3) ... [2021-11-25 17:51:15,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a11dadb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:51:15, skipping insertion in model container [2021-11-25 17:51:15,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:51:15" (3/3) ... [2021-11-25 17:51:15,737 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2021-11-25 17:51:15,743 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:51:15,743 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 17:51:15,793 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:51:15,800 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 [2021-11-25 17:51:15,800 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 17:51:15,815 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 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) [2021-11-25 17:51:15,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 17:51:15,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:15,822 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:15,823 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:15,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:15,829 INFO L85 PathProgramCache]: Analyzing trace with hash 682810099, now seen corresponding path program 1 times [2021-11-25 17:51:15,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:15,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950835492] [2021-11-25 17:51:15,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:15,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:16,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:16,077 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:16,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950835492] [2021-11-25 17:51:16,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950835492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:16,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:16,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 17:51:16,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612873525] [2021-11-25 17:51:16,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:16,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 17:51:16,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:16,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 17:51:16,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 17:51:16,125 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2021-11-25 17:51:16,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:16,188 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2021-11-25 17:51:16,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 17:51:16,191 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 17:51:16,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:16,199 INFO L225 Difference]: With dead ends: 31 [2021-11-25 17:51:16,199 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 17:51:16,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 17:51:16,207 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:16,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:51:16,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 17:51:16,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-25 17:51:16,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:16,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2021-11-25 17:51:16,243 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 10 [2021-11-25 17:51:16,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:16,244 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2021-11-25 17:51:16,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2021-11-25 17:51:16,244 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2021-11-25 17:51:16,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 17:51:16,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:16,246 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:16,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 17:51:16,247 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:16,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:16,251 INFO L85 PathProgramCache]: Analyzing trace with hash -545169927, now seen corresponding path program 1 times [2021-11-25 17:51:16,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:16,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780296229] [2021-11-25 17:51:16,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:16,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:16,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:16,395 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:16,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780296229] [2021-11-25 17:51:16,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780296229] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:16,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:16,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 17:51:16,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989018050] [2021-11-25 17:51:16,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:16,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:51:16,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:16,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:51:16,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:51:16,401 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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) [2021-11-25 17:51:16,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:16,462 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2021-11-25 17:51:16,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:51:16,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-25 17:51:16,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:16,465 INFO L225 Difference]: With dead ends: 38 [2021-11-25 17:51:16,465 INFO L226 Difference]: Without dead ends: 25 [2021-11-25 17:51:16,470 INFO L932 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 [2021-11-25 17:51:16,473 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:16,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:51:16,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-25 17:51:16,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2021-11-25 17:51:16,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 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) [2021-11-25 17:51:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2021-11-25 17:51:16,490 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 12 [2021-11-25 17:51:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:16,492 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-11-25 17:51:16,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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) [2021-11-25 17:51:16,493 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2021-11-25 17:51:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 17:51:16,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:16,497 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:16,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 17:51:16,497 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:16,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:16,498 INFO L85 PathProgramCache]: Analyzing trace with hash -268015701, now seen corresponding path program 1 times [2021-11-25 17:51:16,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:16,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167675330] [2021-11-25 17:51:16,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:16,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:16,637 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:16,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167675330] [2021-11-25 17:51:16,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167675330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:16,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660548806] [2021-11-25 17:51:16,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:16,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:16,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:16,646 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:16,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 17:51:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:16,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 17:51:16,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:51:16,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:51:16,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660548806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:16,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:51:16,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 7 [2021-11-25 17:51:16,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720383268] [2021-11-25 17:51:16,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:16,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:51:16,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:16,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:51:16,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:51:16,910 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:16,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:16,976 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-11-25 17:51:16,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:51:16,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 17:51:16,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:16,978 INFO L225 Difference]: With dead ends: 32 [2021-11-25 17:51:16,978 INFO L226 Difference]: Without dead ends: 28 [2021-11-25 17:51:16,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:51:16,983 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:16,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:51:16,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-25 17:51:16,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2021-11-25 17:51:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:17,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2021-11-25 17:51:17,008 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 13 [2021-11-25 17:51:17,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:17,009 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2021-11-25 17:51:17,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:17,009 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2021-11-25 17:51:17,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 17:51:17,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:17,011 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:17,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 17:51:17,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:17,231 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:17,232 INFO L85 PathProgramCache]: Analyzing trace with hash 334371122, now seen corresponding path program 1 times [2021-11-25 17:51:17,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:17,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812651381] [2021-11-25 17:51:17,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:17,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 17:51:17,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:17,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812651381] [2021-11-25 17:51:17,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812651381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:17,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026542119] [2021-11-25 17:51:17,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:17,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:17,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:17,347 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:17,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 17:51:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:17,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 17:51:17,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:17,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 17:51:17,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:51:17,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026542119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:17,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:51:17,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2021-11-25 17:51:17,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042681447] [2021-11-25 17:51:17,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:17,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:51:17,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:17,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:51:17,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:51:17,483 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:17,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:17,549 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2021-11-25 17:51:17,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:51:17,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-25 17:51:17,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:17,552 INFO L225 Difference]: With dead ends: 53 [2021-11-25 17:51:17,552 INFO L226 Difference]: Without dead ends: 39 [2021-11-25 17:51:17,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:51:17,555 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:17,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:51:17,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-25 17:51:17,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 25. [2021-11-25 17:51:17,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:17,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-11-25 17:51:17,566 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2021-11-25 17:51:17,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:17,566 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-11-25 17:51:17,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:17,567 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-11-25 17:51:17,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 17:51:17,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:17,568 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:17,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 17:51:17,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:17,795 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:17,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:17,795 INFO L85 PathProgramCache]: Analyzing trace with hash -2008657713, now seen corresponding path program 1 times [2021-11-25 17:51:17,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:17,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470315387] [2021-11-25 17:51:17,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:17,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 17:51:17,887 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:17,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470315387] [2021-11-25 17:51:17,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470315387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:17,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198651737] [2021-11-25 17:51:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:17,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:17,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:17,903 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:17,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 17:51:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:17,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 17:51:17,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:18,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:51:18,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 17:51:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:51:18,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 17:51:18,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198651737] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:18,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 17:51:18,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 8] total 12 [2021-11-25 17:51:18,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520255902] [2021-11-25 17:51:18,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:18,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 17:51:18,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:18,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 17:51:18,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-25 17:51:18,336 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2021-11-25 17:51:18,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:18,484 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2021-11-25 17:51:18,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 17:51:18,484 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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 17 [2021-11-25 17:51:18,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:18,485 INFO L225 Difference]: With dead ends: 37 [2021-11-25 17:51:18,485 INFO L226 Difference]: Without dead ends: 23 [2021-11-25 17:51:18,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-25 17:51:18,486 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:18,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 44 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:51:18,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-25 17:51:18,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-25 17:51:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-11-25 17:51:18,491 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 17 [2021-11-25 17:51:18,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:18,491 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-11-25 17:51:18,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2021-11-25 17:51:18,491 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-11-25 17:51:18,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 17:51:18,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:18,492 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:18,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:18,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:18,703 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:18,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:18,703 INFO L85 PathProgramCache]: Analyzing trace with hash -301318537, now seen corresponding path program 1 times [2021-11-25 17:51:18,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:18,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409761379] [2021-11-25 17:51:18,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:18,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 17:51:18,788 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:18,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409761379] [2021-11-25 17:51:18,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409761379] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:18,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064304414] [2021-11-25 17:51:18,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:18,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:18,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:18,795 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:18,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 17:51:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:18,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 17:51:18,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:18,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:51:18,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-25 17:51:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 17:51:18,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 17:51:19,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064304414] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:19,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 17:51:19,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 8] total 12 [2021-11-25 17:51:19,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017121584] [2021-11-25 17:51:19,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:19,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 17:51:19,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:19,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 17:51:19,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-25 17:51:19,154 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-11-25 17:51:19,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:19,310 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2021-11-25 17:51:19,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 17:51:19,311 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) Word has length 18 [2021-11-25 17:51:19,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:19,311 INFO L225 Difference]: With dead ends: 36 [2021-11-25 17:51:19,311 INFO L226 Difference]: Without dead ends: 32 [2021-11-25 17:51:19,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-25 17:51:19,312 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:19,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 25 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:51:19,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-25 17:51:19,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2021-11-25 17:51:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:19,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2021-11-25 17:51:19,318 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 18 [2021-11-25 17:51:19,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:19,318 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2021-11-25 17:51:19,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-11-25 17:51:19,319 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2021-11-25 17:51:19,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 17:51:19,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:19,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:19,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-25 17:51:19,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 17:51:19,539 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:19,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:19,539 INFO L85 PathProgramCache]: Analyzing trace with hash -240200662, now seen corresponding path program 1 times [2021-11-25 17:51:19,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:19,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478771948] [2021-11-25 17:51:19,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:19,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 17:51:19,639 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:19,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478771948] [2021-11-25 17:51:19,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478771948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:19,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867293545] [2021-11-25 17:51:19,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:19,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:19,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:19,645 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:19,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 17:51:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:19,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 17:51:19,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 17:51:19,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 17:51:19,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867293545] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:19,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1600488967] [2021-11-25 17:51:19,819 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 17:51:19,819 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:51:19,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:51:19,831 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:51:19,831 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:51:19,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:19,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:19,985 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 17:51:19,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 17:51:20,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 17:51:20,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2021-11-25 17:51:20,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:20,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:20,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:20,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:20,571 INFO L354 Elim1Store]: treesize reduction 553, result has 13.7 percent of original size [2021-11-25 17:51:20,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 43 case distinctions, treesize of input 456 treesize of output 441 [2021-11-25 17:51:20,765 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 32 treesize of output 28 [2021-11-25 17:51:20,936 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:51:21,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1600488967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:21,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:51:21,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [3, 3, 5] total 17 [2021-11-25 17:51:21,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793205481] [2021-11-25 17:51:21,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:21,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 17:51:21,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:21,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 17:51:21,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-25 17:51:21,348 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 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) [2021-11-25 17:51:21,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:21,464 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2021-11-25 17:51:21,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 17:51:21,464 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 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 19 [2021-11-25 17:51:21,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:21,466 INFO L225 Difference]: With dead ends: 39 [2021-11-25 17:51:21,466 INFO L226 Difference]: Without dead ends: 27 [2021-11-25 17:51:21,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-25 17:51:21,468 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:21,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 20 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:51:21,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-25 17:51:21,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-11-25 17:51:21,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:21,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2021-11-25 17:51:21,476 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 19 [2021-11-25 17:51:21,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:21,476 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2021-11-25 17:51:21,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 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) [2021-11-25 17:51:21,477 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2021-11-25 17:51:21,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 17:51:21,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:21,477 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:21,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:21,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 17:51:21,691 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:21,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:21,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2018430215, now seen corresponding path program 1 times [2021-11-25 17:51:21,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:21,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222056025] [2021-11-25 17:51:21,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:21,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:21,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 17:51:21,772 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:21,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222056025] [2021-11-25 17:51:21,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222056025] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:21,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849783155] [2021-11-25 17:51:21,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:21,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:21,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:21,774 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:21,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 17:51:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:21,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 17:51:21,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 17:51:21,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 17:51:21,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849783155] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:21,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 17:51:21,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2021-11-25 17:51:21,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691117857] [2021-11-25 17:51:21,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:21,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:51:21,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:21,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:51:21,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:51:21,922 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:21,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:21,950 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2021-11-25 17:51:21,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:51:21,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-25 17:51:21,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:21,951 INFO L225 Difference]: With dead ends: 40 [2021-11-25 17:51:21,951 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 17:51:21,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:51:21,952 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:21,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:51:21,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 17:51:21,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-11-25 17:51:21,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 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) [2021-11-25 17:51:21,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-11-25 17:51:21,958 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 21 [2021-11-25 17:51:21,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:21,958 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-11-25 17:51:21,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:21,958 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-11-25 17:51:21,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 17:51:21,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:21,959 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:21,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:22,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:22,175 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:22,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:22,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1616256613, now seen corresponding path program 1 times [2021-11-25 17:51:22,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:22,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314441079] [2021-11-25 17:51:22,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:22,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 17:51:22,237 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:22,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314441079] [2021-11-25 17:51:22,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314441079] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:22,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292852747] [2021-11-25 17:51:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:22,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:22,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:22,246 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:22,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 17:51:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:22,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-25 17:51:22,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:22,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:51:22,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:51:22,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2021-11-25 17:51:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 17:51:22,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 17:51:37,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292852747] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:37,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1124214203] [2021-11-25 17:51:37,104 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 17:51:37,104 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:51:37,105 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:51:37,105 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:51:37,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:51:37,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,177 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 17:51:37,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 17:51:37,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 17:51:37,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 179 [2021-11-25 17:51:37,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:37,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:37,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:37,666 INFO L354 Elim1Store]: treesize reduction 706, result has 7.6 percent of original size [2021-11-25 17:51:37,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 71 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 42 case distinctions, treesize of input 505 treesize of output 446 [2021-11-25 17:51:37,763 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 32 treesize of output 28 [2021-11-25 17:51:38,383 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:51:39,308 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1470#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#input_string~0#1.base|) (+ |ULTIMATE.start_main_~#input_string~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~#input_string~0#1.base|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#vogal_array~0#1.base|) (= |ULTIMATE.start_main_~#vogal_array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#input_string~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 17:51:39,308 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:51:39,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:51:39,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 10, 9] total 19 [2021-11-25 17:51:39,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883902889] [2021-11-25 17:51:39,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:51:39,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-25 17:51:39,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:39,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-25 17:51:39,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=841, Unknown=4, NotChecked=0, Total=992 [2021-11-25 17:51:39,311 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:41,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:41,962 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2021-11-25 17:51:41,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 17:51:41,963 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-25 17:51:41,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:41,964 INFO L225 Difference]: With dead ends: 88 [2021-11-25 17:51:41,964 INFO L226 Difference]: Without dead ends: 66 [2021-11-25 17:51:41,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=269, Invalid=1533, Unknown=4, NotChecked=0, Total=1806 [2021-11-25 17:51:41,965 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 115 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:41,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 116 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 156 Invalid, 0 Unknown, 62 Unchecked, 0.4s Time] [2021-11-25 17:51:41,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-25 17:51:41,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 31. [2021-11-25 17:51:41,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:41,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-11-25 17:51:41,975 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 22 [2021-11-25 17:51:41,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:41,975 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-11-25 17:51:41,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:41,976 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-11-25 17:51:41,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 17:51:41,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:41,976 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:42,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-25 17:51:42,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:42,203 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:42,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:42,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1638150324, now seen corresponding path program 2 times [2021-11-25 17:51:42,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:42,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549230278] [2021-11-25 17:51:42,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:42,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:42,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 17:51:42,257 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:42,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549230278] [2021-11-25 17:51:42,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549230278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:42,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534732397] [2021-11-25 17:51:42,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:51:42,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:42,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:42,270 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:42,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 17:51:42,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 17:51:42,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:51:42,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 17:51:42,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 17:51:42,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:42,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 17:51:42,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534732397] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:42,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1739240339] [2021-11-25 17:51:42,473 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 17:51:42,473 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:51:42,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:51:42,474 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:51:42,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:51:42,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,528 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-11-25 17:51:42,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2021-11-25 17:51:42,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,583 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 17:51:42,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 17:51:42,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 179 [2021-11-25 17:51:42,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:42,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:42,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:43,053 INFO L354 Elim1Store]: treesize reduction 706, result has 7.6 percent of original size [2021-11-25 17:51:43,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 71 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 42 case distinctions, treesize of input 505 treesize of output 446 [2021-11-25 17:51:43,135 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 32 treesize of output 28 [2021-11-25 17:51:43,769 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:51:44,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1839#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#input_string~0#1.base|) (+ |ULTIMATE.start_main_~#input_string~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~#input_string~0#1.base|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#vogal_array~0#1.base|) (= |ULTIMATE.start_main_~#vogal_array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#input_string~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 17:51:44,519 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:51:44,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:51:44,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-25 17:51:44,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839839862] [2021-11-25 17:51:44,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:51:44,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 17:51:44,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:44,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 17:51:44,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-11-25 17:51:44,521 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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) [2021-11-25 17:51:44,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:44,698 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2021-11-25 17:51:44,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 17:51:44,699 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-25 17:51:44,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:44,700 INFO L225 Difference]: With dead ends: 110 [2021-11-25 17:51:44,700 INFO L226 Difference]: Without dead ends: 83 [2021-11-25 17:51:44,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-11-25 17:51:44,701 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 96 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:44,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 70 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:51:44,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-25 17:51:44,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 34. [2021-11-25 17:51:44,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:44,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-11-25 17:51:44,714 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 24 [2021-11-25 17:51:44,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:44,714 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-11-25 17:51:44,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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) [2021-11-25 17:51:44,714 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-11-25 17:51:44,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 17:51:44,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:44,715 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:44,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:44,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 17:51:44,943 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:44,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:44,943 INFO L85 PathProgramCache]: Analyzing trace with hash 2125385662, now seen corresponding path program 3 times [2021-11-25 17:51:44,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:44,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776373015] [2021-11-25 17:51:44,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:44,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 17:51:45,006 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:45,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776373015] [2021-11-25 17:51:45,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776373015] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:45,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030471754] [2021-11-25 17:51:45,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:51:45,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:45,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:45,008 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:45,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 17:51:45,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:51:45,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:51:45,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 17:51:45,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 17:51:45,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 17:51:45,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030471754] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:45,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [410351063] [2021-11-25 17:51:45,195 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 17:51:45,196 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:51:45,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:51:45,196 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:51:45,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:51:45,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,251 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 17:51:45,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 17:51:45,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 17:51:45,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2021-11-25 17:51:45,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:45,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:45,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:45,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:45,670 INFO L354 Elim1Store]: treesize reduction 553, result has 13.7 percent of original size [2021-11-25 17:51:45,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 43 case distinctions, treesize of input 456 treesize of output 441 [2021-11-25 17:51:45,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-25 17:51:46,430 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:51:46,931 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2250#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#input_string~0#1.base|) (+ |ULTIMATE.start_main_~#input_string~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~#input_string~0#1.base|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#vogal_array~0#1.base|) (= |ULTIMATE.start_main_~#vogal_array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#input_string~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 17:51:46,931 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:51:46,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:51:46,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2021-11-25 17:51:46,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291462176] [2021-11-25 17:51:46,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:51:46,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 17:51:46,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:46,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 17:51:46,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-11-25 17:51:46,933 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:47,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:47,021 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2021-11-25 17:51:47,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 17:51:47,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-25 17:51:47,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:47,022 INFO L225 Difference]: With dead ends: 53 [2021-11-25 17:51:47,022 INFO L226 Difference]: Without dead ends: 35 [2021-11-25 17:51:47,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-11-25 17:51:47,024 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:47,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 55 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:51:47,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-25 17:51:47,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-11-25 17:51:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:47,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-11-25 17:51:47,032 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 27 [2021-11-25 17:51:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:47,033 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-11-25 17:51:47,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-11-25 17:51:47,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 17:51:47,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:47,034 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:47,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:47,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 17:51:47,239 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:47,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:47,239 INFO L85 PathProgramCache]: Analyzing trace with hash -2006983306, now seen corresponding path program 4 times [2021-11-25 17:51:47,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:47,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823613925] [2021-11-25 17:51:47,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:47,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 17:51:51,125 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:51,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823613925] [2021-11-25 17:51:51,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823613925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:51,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948424932] [2021-11-25 17:51:51,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 17:51:51,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:51,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:51,132 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:51,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 17:51:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:51,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-25 17:51:51,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:52,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:52,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:52,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:52,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:51:52,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 106 [2021-11-25 17:51:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 17:51:52,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:55,659 INFO L354 Elim1Store]: treesize reduction 203, result has 38.7 percent of original size [2021-11-25 17:51:55,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 557 treesize of output 432 [2021-11-25 17:51:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-25 17:51:56,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948424932] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:56,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [529990913] [2021-11-25 17:51:56,410 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 17:51:56,411 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:51:56,411 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:51:56,411 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:51:56,411 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:51:56,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,459 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-11-25 17:51:56,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2021-11-25 17:51:56,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,505 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 17:51:56,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 17:51:56,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 179 [2021-11-25 17:51:56,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:56,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:56,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:56,872 INFO L354 Elim1Store]: treesize reduction 706, result has 7.6 percent of original size [2021-11-25 17:51:56,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 71 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 42 case distinctions, treesize of input 505 treesize of output 446 [2021-11-25 17:51:56,929 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 32 treesize of output 28 [2021-11-25 17:51:57,487 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:51:58,650 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2602#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#input_string~0#1.base|) (+ |ULTIMATE.start_main_~#input_string~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~#input_string~0#1.base|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#vogal_array~0#1.base|) (= |ULTIMATE.start_main_~#vogal_array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#input_string~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 17:51:58,650 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:51:58,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:51:58,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 11] total 36 [2021-11-25 17:51:58,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576255646] [2021-11-25 17:51:58,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:51:58,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-25 17:51:58,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:58,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-25 17:51:58,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2130, Unknown=0, NotChecked=0, Total=2352 [2021-11-25 17:51:58,653 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:43,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:43,786 INFO L93 Difference]: Finished difference Result 173 states and 226 transitions. [2021-11-25 17:52:43,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-25 17:52:43,787 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-25 17:52:43,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:43,788 INFO L225 Difference]: With dead ends: 173 [2021-11-25 17:52:43,788 INFO L226 Difference]: Without dead ends: 144 [2021-11-25 17:52:43,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4315 ImplicationChecksByTransitivity, 45.9s TimeCoverageRelationStatistics Valid=1559, Invalid=11323, Unknown=0, NotChecked=0, Total=12882 [2021-11-25 17:52:43,795 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 287 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:43,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 204 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 17:52:43,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-25 17:52:43,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 46. [2021-11-25 17:52:43,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 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) [2021-11-25 17:52:43,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-11-25 17:52:43,818 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 28 [2021-11-25 17:52:43,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:43,818 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-11-25 17:52:43,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:43,819 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-11-25 17:52:43,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 17:52:43,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:43,820 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:52:43,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 17:52:44,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:44,047 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:52:44,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:44,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1785196442, now seen corresponding path program 5 times [2021-11-25 17:52:44,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:52:44,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375398117] [2021-11-25 17:52:44,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:44,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:52:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 17:52:44,768 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:52:44,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375398117] [2021-11-25 17:52:44,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375398117] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:52:44,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100819907] [2021-11-25 17:52:44,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:52:44,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:44,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:52:44,795 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:52:44,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 17:52:44,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 17:52:44,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:52:44,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-25 17:52:44,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:45,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 17:52:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 17:52:45,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:45,454 INFO L354 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2021-11-25 17:52:45,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 30 [2021-11-25 17:52:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 17:52:45,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100819907] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:45,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [455066092] [2021-11-25 17:52:45,506 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 17:52:45,506 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:52:45,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:52:45,506 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:52:45,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:52:45,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,569 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-11-25 17:52:45,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2021-11-25 17:52:45,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,621 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 17:52:45,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 17:52:45,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2021-11-25 17:52:45,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:45,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:45,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:45,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:45,991 INFO L354 Elim1Store]: treesize reduction 553, result has 13.7 percent of original size [2021-11-25 17:52:45,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 43 case distinctions, treesize of input 456 treesize of output 441 [2021-11-25 17:52:46,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-25 17:52:46,763 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:52:47,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3325#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#input_string~0#1.base|) (+ |ULTIMATE.start_main_~#input_string~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~#input_string~0#1.base|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#vogal_array~0#1.base|) (= |ULTIMATE.start_main_~#vogal_array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#input_string~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 17:52:47,863 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:52:47,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:52:47,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2021-11-25 17:52:47,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422571742] [2021-11-25 17:52:47,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:52:47,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 17:52:47,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:52:47,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 17:52:47,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 17:52:47,866 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 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) [2021-11-25 17:52:48,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:48,592 INFO L93 Difference]: Finished difference Result 94 states and 115 transitions. [2021-11-25 17:52:48,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 17:52:48,592 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 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 33 [2021-11-25 17:52:48,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:48,593 INFO L225 Difference]: With dead ends: 94 [2021-11-25 17:52:48,593 INFO L226 Difference]: Without dead ends: 57 [2021-11-25 17:52:48,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=339, Invalid=2313, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 17:52:48,595 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 114 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:48,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 96 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 17:52:48,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-25 17:52:48,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 40. [2021-11-25 17:52:48,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 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) [2021-11-25 17:52:48,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-11-25 17:52:48,625 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 33 [2021-11-25 17:52:48,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:48,625 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-11-25 17:52:48,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 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) [2021-11-25 17:52:48,626 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-11-25 17:52:48,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 17:52:48,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:48,628 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:52:48,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-25 17:52:48,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 17:52:48,831 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:52:48,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:48,831 INFO L85 PathProgramCache]: Analyzing trace with hash 2112038823, now seen corresponding path program 6 times [2021-11-25 17:52:48,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:52:48,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674882334] [2021-11-25 17:52:48,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:48,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:52:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 17:52:49,362 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:52:49,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674882334] [2021-11-25 17:52:49,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674882334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:52:49,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66500311] [2021-11-25 17:52:49,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:52:49,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:49,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:52:49,365 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:52:49,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 17:52:49,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:52:49,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:52:49,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 17:52:49,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:49,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-25 17:52:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 17:52:49,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:50,185 INFO L354 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2021-11-25 17:52:50,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 31 [2021-11-25 17:52:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 17:52:50,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66500311] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:50,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2049512284] [2021-11-25 17:52:50,252 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 17:52:50,252 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:52:50,253 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:52:50,253 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:52:50,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:52:50,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,317 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-11-25 17:52:50,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2021-11-25 17:52:50,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,378 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 17:52:50,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 17:52:50,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 179 [2021-11-25 17:52:50,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:50,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:50,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:50,858 INFO L354 Elim1Store]: treesize reduction 706, result has 7.6 percent of original size [2021-11-25 17:52:50,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 71 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 42 case distinctions, treesize of input 505 treesize of output 446 [2021-11-25 17:52:50,924 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 32 treesize of output 28 [2021-11-25 17:52:51,483 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:52:52,251 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3811#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#input_string~0#1.base|) (+ |ULTIMATE.start_main_~#input_string~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~#input_string~0#1.base|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#vogal_array~0#1.base|) (= |ULTIMATE.start_main_~#vogal_array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#input_string~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 17:52:52,252 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:52:52,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:52:52,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 11] total 23 [2021-11-25 17:52:52,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293427554] [2021-11-25 17:52:52,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:52:52,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 17:52:52,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:52:52,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 17:52:52,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 17:52:52,254 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 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) [2021-11-25 17:52:52,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:52,640 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-11-25 17:52:52,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 17:52:52,641 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 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 34 [2021-11-25 17:52:52,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:52,641 INFO L225 Difference]: With dead ends: 57 [2021-11-25 17:52:52,642 INFO L226 Difference]: Without dead ends: 53 [2021-11-25 17:52:52,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=242, Invalid=1480, Unknown=0, NotChecked=0, Total=1722 [2021-11-25 17:52:52,644 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 87 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:52,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 103 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 288 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2021-11-25 17:52:52,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-25 17:52:52,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2021-11-25 17:52:52,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:52,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-11-25 17:52:52,664 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 34 [2021-11-25 17:52:52,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:52,665 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-11-25 17:52:52,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 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) [2021-11-25 17:52:52,665 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-11-25 17:52:52,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 17:52:52,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:52,666 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:52:52,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 17:52:52,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 17:52:52,884 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:52:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:52,885 INFO L85 PathProgramCache]: Analyzing trace with hash -505912715, now seen corresponding path program 7 times [2021-11-25 17:52:52,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:52:52,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491135574] [2021-11-25 17:52:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:52,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:52:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-25 17:52:53,029 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:52:53,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491135574] [2021-11-25 17:52:53,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491135574] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:52:53,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369450721] [2021-11-25 17:52:53,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 17:52:53,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:53,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:52:53,035 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:52:53,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 17:52:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:53,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 17:52:53,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 17:52:53,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 17:52:53,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369450721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:53,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [935526698] [2021-11-25 17:52:53,506 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 17:52:53,506 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:52:53,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:52:53,507 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:52:53,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:52:53,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,562 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-11-25 17:52:53,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2021-11-25 17:52:53,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,608 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 17:52:53,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 17:52:53,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2021-11-25 17:52:53,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:53,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:53,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:53,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:54,016 INFO L354 Elim1Store]: treesize reduction 553, result has 13.7 percent of original size [2021-11-25 17:52:54,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 43 case distinctions, treesize of input 456 treesize of output 441 [2021-11-25 17:52:54,137 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 32 treesize of output 28 [2021-11-25 17:52:54,682 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:52:55,363 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4216#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#input_string~0#1.base|) (+ |ULTIMATE.start_main_~#input_string~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~#input_string~0#1.base|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#vogal_array~0#1.base|) (= |ULTIMATE.start_main_~#vogal_array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#input_string~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 17:52:55,363 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:52:55,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:52:55,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 10] total 22 [2021-11-25 17:52:55,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288462181] [2021-11-25 17:52:55,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:52:55,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-25 17:52:55,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:52:55,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-25 17:52:55,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 17:52:55,369 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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) [2021-11-25 17:53:00,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:53:00,346 INFO L93 Difference]: Finished difference Result 191 states and 206 transitions. [2021-11-25 17:53:00,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-25 17:53:00,347 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-25 17:53:00,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:53:00,348 INFO L225 Difference]: With dead ends: 191 [2021-11-25 17:53:00,348 INFO L226 Difference]: Without dead ends: 175 [2021-11-25 17:53:00,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2779 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1018, Invalid=6814, Unknown=0, NotChecked=0, Total=7832 [2021-11-25 17:53:00,351 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 303 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 17:53:00,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 103 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 17:53:00,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-25 17:53:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 49. [2021-11-25 17:53:00,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 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) [2021-11-25 17:53:00,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-11-25 17:53:00,377 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 35 [2021-11-25 17:53:00,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:53:00,377 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-11-25 17:53:00,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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) [2021-11-25 17:53:00,377 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-11-25 17:53:00,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 17:53:00,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:53:00,378 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:53:00,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 17:53:00,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:53:00,596 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:53:00,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:53:00,596 INFO L85 PathProgramCache]: Analyzing trace with hash 151018505, now seen corresponding path program 8 times [2021-11-25 17:53:00,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:53:00,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363542953] [2021-11-25 17:53:00,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:53:00,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:53:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:53:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 17:53:13,021 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:53:13,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363542953] [2021-11-25 17:53:13,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363542953] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:53:13,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521949736] [2021-11-25 17:53:13,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:53:13,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:53:13,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:53:13,022 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:53:13,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 17:53:13,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 17:53:13,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:53:13,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-25 17:53:13,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:53:13,306 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 17:53:13,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-25 17:53:13,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-25 17:53:13,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-25 17:53:13,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-25 17:53:13,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2021-11-25 17:53:13,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2021-11-25 17:53:13,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 11 [2021-11-25 17:53:13,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:53:13,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-25 17:53:18,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 435 treesize of output 203 [2021-11-25 17:53:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 17:53:19,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:54:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 17:54:01,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521949736] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:54:01,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1064904146] [2021-11-25 17:54:01,746 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 17:54:01,746 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:54:01,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:54:01,747 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:54:01,747 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:54:01,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,811 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-11-25 17:54:01,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2021-11-25 17:54:01,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,858 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 17:54:01,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 17:54:01,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:01,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2021-11-25 17:54:02,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:54:02,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:54:02,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:02,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:54:02,184 INFO L354 Elim1Store]: treesize reduction 553, result has 13.7 percent of original size [2021-11-25 17:54:02,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 43 case distinctions, treesize of input 456 treesize of output 441 [2021-11-25 17:54:02,368 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 32 treesize of output 28 [2021-11-25 17:54:02,817 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:54:05,067 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5042#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#input_string~0#1.base|) (+ |ULTIMATE.start_main_~#input_string~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~#input_string~0#1.base|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#vogal_array~0#1.base|) (= |ULTIMATE.start_main_~#vogal_array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#input_string~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 17:54:05,067 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:54:05,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:54:05,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 21] total 71 [2021-11-25 17:54:05,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343547189] [2021-11-25 17:54:05,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:54:05,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-25 17:54:05,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:54:05,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-25 17:54:05,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=6453, Unknown=0, NotChecked=0, Total=6972 [2021-11-25 17:54:05,072 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 71 states, 71 states have (on average 1.4647887323943662) internal successors, (104), 71 states have internal predecessors, (104), 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) [2021-11-25 17:54:21,436 WARN L227 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 538 DAG size of output: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:54:48,081 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 555 DAG size of output: 125 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:55:10,921 WARN L227 SmtUtils]: Spent 18.62s on a formula simplification. DAG size of input: 395 DAG size of output: 201 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:55:25,455 WARN L227 SmtUtils]: Spent 8.23s on a formula simplification. DAG size of input: 456 DAG size of output: 176 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:55:34,036 WARN L227 SmtUtils]: Spent 7.83s on a formula simplification. DAG size of input: 410 DAG size of output: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:55:52,491 WARN L227 SmtUtils]: Spent 15.95s on a formula simplification. DAG size of input: 418 DAG size of output: 206 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:56:07,198 WARN L227 SmtUtils]: Spent 10.67s on a formula simplification. DAG size of input: 473 DAG size of output: 199 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:56:18,081 WARN L227 SmtUtils]: Spent 8.71s on a formula simplification. DAG size of input: 479 DAG size of output: 182 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:56:43,354 WARN L227 SmtUtils]: Spent 14.08s on a formula simplification. DAG size of input: 487 DAG size of output: 189 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:56:55,784 WARN L227 SmtUtils]: Spent 10.44s on a formula simplification. DAG size of input: 387 DAG size of output: 226 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:57:01,967 WARN L227 SmtUtils]: Spent 5.07s on a formula simplification. DAG size of input: 553 DAG size of output: 102 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:57:12,204 WARN L227 SmtUtils]: Spent 8.49s on a formula simplification. DAG size of input: 407 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:57:22,752 WARN L227 SmtUtils]: Spent 6.23s on a formula simplification. DAG size of input: 451 DAG size of output: 202 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:57:45,851 WARN L227 SmtUtils]: Spent 12.69s on a formula simplification. DAG size of input: 415 DAG size of output: 203 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:58:01,618 WARN L227 SmtUtils]: Spent 13.21s on a formula simplification. DAG size of input: 390 DAG size of output: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:58:19,705 WARN L227 SmtUtils]: Spent 9.70s on a formula simplification. DAG size of input: 409 DAG size of output: 102 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:58:35,564 WARN L227 SmtUtils]: Spent 14.14s on a formula simplification. DAG size of input: 399 DAG size of output: 103 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:58:51,843 WARN L227 SmtUtils]: Spent 13.87s on a formula simplification. DAG size of input: 474 DAG size of output: 170 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:59:05,091 WARN L227 SmtUtils]: Spent 11.69s on a formula simplification. DAG size of input: 418 DAG size of output: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:59:15,789 WARN L227 SmtUtils]: Spent 7.30s on a formula simplification. DAG size of input: 398 DAG size of output: 123 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:59:29,761 WARN L227 SmtUtils]: Spent 12.47s on a formula simplification. DAG size of input: 483 DAG size of output: 175 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:59:38,807 WARN L227 SmtUtils]: Spent 6.79s on a formula simplification. DAG size of input: 492 DAG size of output: 144 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:59:47,806 WARN L227 SmtUtils]: Spent 5.49s on a formula simplification. DAG size of input: 416 DAG size of output: 106 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:59:55,584 WARN L227 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 576 DAG size of output: 137 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:00:16,858 WARN L227 SmtUtils]: Spent 18.75s on a formula simplification. DAG size of input: 390 DAG size of output: 192 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:00:33,895 WARN L227 SmtUtils]: Spent 14.17s on a formula simplification. DAG size of input: 478 DAG size of output: 184 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:00:56,952 WARN L227 SmtUtils]: Spent 13.93s on a formula simplification. DAG size of input: 409 DAG size of output: 170 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:01:06,884 WARN L227 SmtUtils]: Spent 7.34s on a formula simplification. DAG size of input: 418 DAG size of output: 121 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:01:23,485 WARN L227 SmtUtils]: Spent 13.99s on a formula simplification. DAG size of input: 399 DAG size of output: 197 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:01:42,998 WARN L227 SmtUtils]: Spent 15.75s on a formula simplification. DAG size of input: 418 DAG size of output: 175 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:02:07,061 WARN L227 SmtUtils]: Spent 14.51s on a formula simplification. DAG size of input: 394 DAG size of output: 185 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:02:23,631 WARN L227 SmtUtils]: Spent 14.59s on a formula simplification. DAG size of input: 519 DAG size of output: 214 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:02:51,490 WARN L227 SmtUtils]: Spent 19.41s on a formula simplification. DAG size of input: 413 DAG size of output: 187 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:03:20,646 WARN L227 SmtUtils]: Spent 16.56s on a formula simplification. DAG size of input: 435 DAG size of output: 215 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:03:40,736 WARN L227 SmtUtils]: Spent 16.63s on a formula simplification. DAG size of input: 454 DAG size of output: 217 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:03:57,278 WARN L227 SmtUtils]: Spent 13.22s on a formula simplification. DAG size of input: 389 DAG size of output: 213 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:04:07,989 WARN L227 SmtUtils]: Spent 9.83s on a formula simplification. DAG size of input: 482 DAG size of output: 204 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:04:21,094 WARN L227 SmtUtils]: Spent 11.57s on a formula simplification. DAG size of input: 408 DAG size of output: 202 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:04:36,098 WARN L227 SmtUtils]: Spent 10.34s on a formula simplification. DAG size of input: 398 DAG size of output: 218 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:04:48,942 WARN L227 SmtUtils]: Spent 11.63s on a formula simplification. DAG size of input: 417 DAG size of output: 207 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:04:48,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:48,947 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2021-11-25 18:04:48,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-11-25 18:04:48,948 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.4647887323943662) internal successors, (104), 71 states have internal predecessors, (104), 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 39 [2021-11-25 18:04:48,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:48,949 INFO L225 Difference]: With dead ends: 187 [2021-11-25 18:04:48,949 INFO L226 Difference]: Without dead ends: 181 [2021-11-25 18:04:48,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10706 ImplicationChecksByTransitivity, 654.7s TimeCoverageRelationStatistics Valid=2812, Invalid=29408, Unknown=0, NotChecked=0, Total=32220 [2021-11-25 18:04:48,956 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 522 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 794 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:48,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 374 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [794 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2021-11-25 18:04:48,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-25 18:04:49,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 73. [2021-11-25 18:04:49,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 72 states have internal predecessors, (83), 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) [2021-11-25 18:04:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-11-25 18:04:49,001 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 39 [2021-11-25 18:04:49,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:49,002 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-11-25 18:04:49,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.4647887323943662) internal successors, (104), 71 states have internal predecessors, (104), 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) [2021-11-25 18:04:49,002 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-11-25 18:04:49,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-25 18:04:49,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:49,006 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:49,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:49,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 18:04:49,235 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:04:49,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:49,236 INFO L85 PathProgramCache]: Analyzing trace with hash 320741985, now seen corresponding path program 9 times [2021-11-25 18:04:49,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:49,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969326193] [2021-11-25 18:04:49,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:49,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-25 18:04:49,456 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:49,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969326193] [2021-11-25 18:04:49,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969326193] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:04:49,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784700622] [2021-11-25 18:04:49,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:04:49,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:04:49,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:04:49,459 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:04:49,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 18:04:49,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:04:49,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:04:49,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-25 18:04:49,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:49,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-25 18:04:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 18:04:50,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:04:50,326 INFO L354 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2021-11-25 18:04:50,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 31 [2021-11-25 18:04:50,418 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-25 18:04:50,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784700622] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:04:50,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [167218563] [2021-11-25 18:04:50,421 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:04:50,421 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:04:50,422 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:04:50,422 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:04:50,422 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:04:50,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,464 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-11-25 18:04:50,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2021-11-25 18:04:50,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,503 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 18:04:50,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 18:04:50,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 179 [2021-11-25 18:04:50,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:50,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:50,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:50,874 INFO L354 Elim1Store]: treesize reduction 706, result has 7.6 percent of original size [2021-11-25 18:04:50,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 71 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 42 case distinctions, treesize of input 505 treesize of output 446 [2021-11-25 18:04:50,958 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 32 treesize of output 28 [2021-11-25 18:04:51,386 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:04:52,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5973#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#input_string~0#1.base|) (+ |ULTIMATE.start_main_~#input_string~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~#input_string~0#1.base|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#vogal_array~0#1.base|) (= |ULTIMATE.start_main_~#vogal_array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#input_string~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:04:52,423 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:04:52,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:04:52,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 11] total 35 [2021-11-25 18:04:52,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544423713] [2021-11-25 18:04:52,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:04:52,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-25 18:04:52,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:04:52,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-25 18:04:52,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2061, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 18:04:52,425 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:55,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:55,777 INFO L93 Difference]: Finished difference Result 304 states and 331 transitions. [2021-11-25 18:04:55,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-25 18:04:55,777 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-25 18:04:55,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:55,779 INFO L225 Difference]: With dead ends: 304 [2021-11-25 18:04:55,779 INFO L226 Difference]: Without dead ends: 275 [2021-11-25 18:04:55,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3474 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=957, Invalid=11253, Unknown=0, NotChecked=0, Total=12210 [2021-11-25 18:04:55,781 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 283 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 3068 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 3464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 3068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:55,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 839 Invalid, 3464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 3068 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-25 18:04:55,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-25 18:04:55,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 70. [2021-11-25 18:04:55,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 69 states have internal predecessors, (78), 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) [2021-11-25 18:04:55,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-11-25 18:04:55,823 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 43 [2021-11-25 18:04:55,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:55,823 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-11-25 18:04:55,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:55,823 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-11-25 18:04:55,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 18:04:55,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:55,824 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:55,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:56,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec99128b-6971-464a-aa83-4008f00d4e30/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 18:04:56,027 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:04:56,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:56,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1262392551, now seen corresponding path program 10 times [2021-11-25 18:04:56,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:56,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621341732] [2021-11-25 18:04:56,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:56,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat