./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 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/vogal-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:24:11,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:24:11,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:24:11,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:24:11,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:24:11,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:24:11,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:24:11,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:24:11,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:24:11,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:24:11,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:24:11,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:24:11,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:24:11,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:24:11,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:24:11,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:24:11,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:24:11,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:24:11,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:24:11,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:24:11,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:24:11,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:24:11,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:24:11,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:24:11,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:24:11,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:24:11,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:24:11,403 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:24:11,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:24:11,405 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:24:11,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:24:11,406 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:24:11,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:24:11,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:24:11,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:24:11,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:24:11,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:24:11,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:24:11,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:24:11,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:24:11,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:24:11,416 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:24:11,447 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:24:11,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:24:11,448 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:24:11,448 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:24:11,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:24:11,449 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:24:11,450 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:24:11,450 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:24:11,450 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:24:11,451 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:24:11,451 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:24:11,452 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:24:11,452 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:24:11,452 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:24:11,453 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:24:11,453 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:24:11,453 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:24:11,454 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:24:11,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:24:11,460 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:24:11,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:24:11,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:24:11,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:24:11,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:24:11,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:24:11,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:24:11,464 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:24:11,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:24:11,465 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:24:11,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:24:11,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:24:11,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:24:11,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:24:11,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:24:11,468 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:24:11,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:24:11,469 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:24:11,470 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:24:11,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:24:11,470 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:24:11,470 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:24:11,471 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e [2022-11-03 02:24:11,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:24:11,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:24:11,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:24:11,932 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:24:11,933 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:24:11,934 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/loops/vogal-1.i [2022-11-03 02:24:12,024 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/data/7187ffd4c/16e53eed9a104debbbe2b3048f2d38a3/FLAGc8e7df9cb [2022-11-03 02:24:12,574 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:24:12,575 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/sv-benchmarks/c/loops/vogal-1.i [2022-11-03 02:24:12,588 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/data/7187ffd4c/16e53eed9a104debbbe2b3048f2d38a3/FLAGc8e7df9cb [2022-11-03 02:24:12,891 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/data/7187ffd4c/16e53eed9a104debbbe2b3048f2d38a3 [2022-11-03 02:24:12,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:24:12,901 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:24:12,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:24:12,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:24:12,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:24:12,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:24:12" (1/1) ... [2022-11-03 02:24:12,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52dfc8fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:12, skipping insertion in model container [2022-11-03 02:24:12,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:24:12" (1/1) ... [2022-11-03 02:24:12,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:24:12,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:24:13,175 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_f769c203-a01a-4bec-8945-0d59e08b0812/sv-benchmarks/c/loops/vogal-1.i[895,908] [2022-11-03 02:24:13,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:24:13,221 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:24:13,240 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_f769c203-a01a-4bec-8945-0d59e08b0812/sv-benchmarks/c/loops/vogal-1.i[895,908] [2022-11-03 02:24:13,260 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:24:13,283 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:24:13,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:13 WrapperNode [2022-11-03 02:24:13,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:24:13,285 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:24:13,285 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:24:13,286 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:24:13,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:13" (1/1) ... [2022-11-03 02:24:13,314 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:13" (1/1) ... [2022-11-03 02:24:13,354 INFO L138 Inliner]: procedures = 17, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 133 [2022-11-03 02:24:13,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:24:13,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:24:13,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:24:13,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:24:13,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:13" (1/1) ... [2022-11-03 02:24:13,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:13" (1/1) ... [2022-11-03 02:24:13,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:13" (1/1) ... [2022-11-03 02:24:13,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:13" (1/1) ... [2022-11-03 02:24:13,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:13" (1/1) ... [2022-11-03 02:24:13,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:13" (1/1) ... [2022-11-03 02:24:13,413 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:13" (1/1) ... [2022-11-03 02:24:13,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:13" (1/1) ... [2022-11-03 02:24:13,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:24:13,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:24:13,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:24:13,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:24:13,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:13" (1/1) ... [2022-11-03 02:24:13,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:24:13,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:24:13,463 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:24:13,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:24:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:24:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:24:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:24:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:24:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:24:13,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:24:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:24:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:24:13,637 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:24:13,639 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:24:13,848 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:24:13,995 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:24:14,009 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-03 02:24:14,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:24:14 BoogieIcfgContainer [2022-11-03 02:24:14,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:24:14,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:24:14,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:24:14,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:24:14,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:24:12" (1/3) ... [2022-11-03 02:24:14,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63854ee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:24:14, skipping insertion in model container [2022-11-03 02:24:14,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:24:13" (2/3) ... [2022-11-03 02:24:14,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63854ee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:24:14, skipping insertion in model container [2022-11-03 02:24:14,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:24:14" (3/3) ... [2022-11-03 02:24:14,028 INFO L112 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2022-11-03 02:24:14,052 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:24:14,052 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:24:14,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:24:14,112 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@284904ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:24:14,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:24:14,117 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) [2022-11-03 02:24:14,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 02:24:14,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:24:14,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:24:14,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:24:14,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:24:14,134 INFO L85 PathProgramCache]: Analyzing trace with hash 682810099, now seen corresponding path program 1 times [2022-11-03 02:24:14,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:24:14,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912757609] [2022-11-03 02:24:14,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:14,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:24:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:24:14,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:24:14,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912757609] [2022-11-03 02:24:14,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912757609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:24:14,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:24:14,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:24:14,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963535929] [2022-11-03 02:24:14,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:24:14,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:24:14,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:24:14,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:24:14,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:24:14,516 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) [2022-11-03 02:24:14,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:24:14,602 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2022-11-03 02:24:14,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:24:14,606 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 [2022-11-03 02:24:14,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:24:14,616 INFO L225 Difference]: With dead ends: 31 [2022-11-03 02:24:14,617 INFO L226 Difference]: Without dead ends: 15 [2022-11-03 02:24:14,621 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:24:14,626 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:24:14,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:24:14,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-03 02:24:14,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-03 02:24:14,663 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) [2022-11-03 02:24:14,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2022-11-03 02:24:14,666 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 10 [2022-11-03 02:24:14,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:24:14,666 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2022-11-03 02:24:14,667 INFO L496 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) [2022-11-03 02:24:14,668 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2022-11-03 02:24:14,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 02:24:14,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:24:14,669 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:24:14,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:24:14,670 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:24:14,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:24:14,673 INFO L85 PathProgramCache]: Analyzing trace with hash -545169927, now seen corresponding path program 1 times [2022-11-03 02:24:14,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:24:14,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125855693] [2022-11-03 02:24:14,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:14,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:24:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:24:14,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:24:14,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125855693] [2022-11-03 02:24:14,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125855693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:24:14,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:24:14,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:24:14,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723286025] [2022-11-03 02:24:14,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:24:14,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:24:14,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:24:14,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:24:14,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:24:14,941 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) [2022-11-03 02:24:15,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:24:15,010 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2022-11-03 02:24:15,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:24:15,011 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 [2022-11-03 02:24:15,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:24:15,012 INFO L225 Difference]: With dead ends: 38 [2022-11-03 02:24:15,012 INFO L226 Difference]: Without dead ends: 25 [2022-11-03 02:24:15,013 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:24:15,015 INFO L413 NwaCegarLoop]: 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:24:15,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:24:15,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-03 02:24:15,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2022-11-03 02:24:15,021 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) [2022-11-03 02:24:15,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2022-11-03 02:24:15,022 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 12 [2022-11-03 02:24:15,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:24:15,022 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2022-11-03 02:24:15,022 INFO L496 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) [2022-11-03 02:24:15,023 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2022-11-03 02:24:15,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:24:15,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:24:15,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:24:15,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:24:15,024 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:24:15,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:24:15,025 INFO L85 PathProgramCache]: Analyzing trace with hash -268015701, now seen corresponding path program 1 times [2022-11-03 02:24:15,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:24:15,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339607299] [2022-11-03 02:24:15,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:15,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:24:15,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:24:15,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:24:15,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339607299] [2022-11-03 02:24:15,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339607299] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:24:15,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611848929] [2022-11-03 02:24:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:15,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:24:15,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:24:15,342 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:24:15,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:24:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:15,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:24:15,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:24:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:24:15,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:24:15,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611848929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:24:15,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:24:15,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 7 [2022-11-03 02:24:15,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976640769] [2022-11-03 02:24:15,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:24:15,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:24:15,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:24:15,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:24:15,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:24:15,593 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) [2022-11-03 02:24:15,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:24:15,694 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-11-03 02:24:15,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:24:15,695 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 [2022-11-03 02:24:15,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:24:15,696 INFO L225 Difference]: With dead ends: 32 [2022-11-03 02:24:15,696 INFO L226 Difference]: Without dead ends: 28 [2022-11-03 02:24:15,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:24:15,701 INFO L413 NwaCegarLoop]: 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:24:15,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:24:15,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-03 02:24:15,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2022-11-03 02:24:15,710 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) [2022-11-03 02:24:15,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2022-11-03 02:24:15,713 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 13 [2022-11-03 02:24:15,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:24:15,713 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2022-11-03 02:24:15,714 INFO L496 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) [2022-11-03 02:24:15,714 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2022-11-03 02:24:15,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 02:24:15,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:24:15,715 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:24:15,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:24:15,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:24:15,933 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:24:15,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:24:15,934 INFO L85 PathProgramCache]: Analyzing trace with hash 334371122, now seen corresponding path program 1 times [2022-11-03 02:24:15,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:24:15,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687553181] [2022-11-03 02:24:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:15,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:24:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:24:16,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:24:16,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687553181] [2022-11-03 02:24:16,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687553181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:24:16,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344053780] [2022-11-03 02:24:16,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:16,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:24:16,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:24:16,177 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:24:16,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:24:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:16,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:24:16,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:24:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:24:16,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:24:16,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344053780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:24:16,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:24:16,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2022-11-03 02:24:16,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686709910] [2022-11-03 02:24:16,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:24:16,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:24:16,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:24:16,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:24:16,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:24:16,311 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) [2022-11-03 02:24:16,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:24:16,368 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2022-11-03 02:24:16,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:24:16,369 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 [2022-11-03 02:24:16,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:24:16,370 INFO L225 Difference]: With dead ends: 53 [2022-11-03 02:24:16,370 INFO L226 Difference]: Without dead ends: 39 [2022-11-03 02:24:16,371 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:24:16,372 INFO L413 NwaCegarLoop]: 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 [2022-11-03 02:24:16,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:24:16,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-03 02:24:16,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 25. [2022-11-03 02:24:16,378 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) [2022-11-03 02:24:16,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2022-11-03 02:24:16,379 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2022-11-03 02:24:16,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:24:16,380 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-11-03 02:24:16,380 INFO L496 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) [2022-11-03 02:24:16,380 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2022-11-03 02:24:16,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 02:24:16,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:24:16,381 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:24:16,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:24:16,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:24:16,607 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:24:16,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:24:16,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2008657713, now seen corresponding path program 1 times [2022-11-03 02:24:16,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:24:16,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408637658] [2022-11-03 02:24:16,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:16,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:24:16,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:24:16,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:24:16,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408637658] [2022-11-03 02:24:16,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408637658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:24:16,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764570161] [2022-11-03 02:24:16,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:16,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:24:16,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:24:16,797 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:24:16,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:24:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:16,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:24:16,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:24:16,930 INFO L390 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 [2022-11-03 02:24:16,998 INFO L390 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 [2022-11-03 02:24:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:24:17,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:24:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:24:17,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764570161] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:24:17,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:24:17,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 8] total 12 [2022-11-03 02:24:17,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202104538] [2022-11-03 02:24:17,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:24:17,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:24:17,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:24:17,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:24:17,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:24:17,278 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) [2022-11-03 02:24:17,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:24:17,567 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2022-11-03 02:24:17,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:24:17,570 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 [2022-11-03 02:24:17,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:24:17,571 INFO L225 Difference]: With dead ends: 37 [2022-11-03 02:24:17,571 INFO L226 Difference]: Without dead ends: 23 [2022-11-03 02:24:17,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:24:17,573 INFO L413 NwaCegarLoop]: 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 [2022-11-03 02:24:17,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 44 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:24:17,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-03 02:24:17,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-03 02:24:17,578 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) [2022-11-03 02:24:17,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2022-11-03 02:24:17,579 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 17 [2022-11-03 02:24:17,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:24:17,580 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2022-11-03 02:24:17,580 INFO L496 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) [2022-11-03 02:24:17,580 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2022-11-03 02:24:17,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:24:17,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:24:17,581 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:24:17,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:24:17,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:24:17,782 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:24:17,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:24:17,783 INFO L85 PathProgramCache]: Analyzing trace with hash -301318537, now seen corresponding path program 1 times [2022-11-03 02:24:17,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:24:17,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574152642] [2022-11-03 02:24:17,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:17,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:24:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:24:17,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:24:17,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574152642] [2022-11-03 02:24:17,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574152642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:24:17,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222088195] [2022-11-03 02:24:17,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:17,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:24:17,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:24:17,906 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:24:17,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:24:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:18,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:24:18,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:24:18,026 INFO L390 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 [2022-11-03 02:24:18,124 INFO L390 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 [2022-11-03 02:24:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:24:18,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:24:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:24:18,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222088195] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:24:18,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:24:18,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 8] total 12 [2022-11-03 02:24:18,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933419886] [2022-11-03 02:24:18,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:24:18,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:24:18,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:24:18,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:24:18,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:24:18,332 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) [2022-11-03 02:24:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:24:18,573 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2022-11-03 02:24:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:24:18,575 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 [2022-11-03 02:24:18,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:24:18,575 INFO L225 Difference]: With dead ends: 36 [2022-11-03 02:24:18,576 INFO L226 Difference]: Without dead ends: 32 [2022-11-03 02:24:18,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:24:18,577 INFO L413 NwaCegarLoop]: 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 [2022-11-03 02:24:18,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 25 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:24:18,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-03 02:24:18,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-11-03 02:24:18,585 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) [2022-11-03 02:24:18,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2022-11-03 02:24:18,585 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 18 [2022-11-03 02:24:18,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:24:18,586 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2022-11-03 02:24:18,586 INFO L496 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) [2022-11-03 02:24:18,586 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2022-11-03 02:24:18,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:24:18,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:24:18,587 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:24:18,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:24:18,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:24:18,814 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:24:18,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:24:18,815 INFO L85 PathProgramCache]: Analyzing trace with hash -240200662, now seen corresponding path program 1 times [2022-11-03 02:24:18,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:24:18,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678866692] [2022-11-03 02:24:18,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:18,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:24:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:24:18,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:24:18,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678866692] [2022-11-03 02:24:18,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678866692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:24:18,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084887589] [2022-11-03 02:24:18,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:18,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:24:18,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:24:18,930 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:24:18,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:24:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:19,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:24:19,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:24:19,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:24:19,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:24:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:24:19,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084887589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:24:19,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1588510817] [2022-11-03 02:24:19,109 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 02:24:19,109 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:24:19,113 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:24:19,120 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:24:19,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:24:19,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,250 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 02:24:19,250 INFO L390 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 [2022-11-03 02:24:19,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,286 INFO L390 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 [2022-11-03 02:24:19,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,415 INFO L390 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 [2022-11-03 02:24:19,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:24:19,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:24:19,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:19,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:24:19,960 INFO L356 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-11-03 02:24:19,961 INFO L390 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 452 treesize of output 437 [2022-11-03 02:24:20,231 INFO L390 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 [2022-11-03 02:24:20,369 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:24:20,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1588510817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:24:20,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:24:20,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [3, 3, 5] total 17 [2022-11-03 02:24:20,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801607179] [2022-11-03 02:24:20,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:24:20,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:24:20,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:24:20,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:24:20,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:24:20,975 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) [2022-11-03 02:24:21,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:24:21,184 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-11-03 02:24:21,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:24:21,185 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 [2022-11-03 02:24:21,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:24:21,189 INFO L225 Difference]: With dead ends: 39 [2022-11-03 02:24:21,189 INFO L226 Difference]: Without dead ends: 27 [2022-11-03 02:24:21,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:24:21,191 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:24:21,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 20 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:24:21,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-03 02:24:21,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-11-03 02:24:21,216 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) [2022-11-03 02:24:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-11-03 02:24:21,220 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 19 [2022-11-03 02:24:21,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:24:21,220 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-11-03 02:24:21,221 INFO L496 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) [2022-11-03 02:24:21,221 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-11-03 02:24:21,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 02:24:21,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:24:21,223 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:24:21,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-03 02:24:21,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:24:21,437 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:24:21,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:24:21,437 INFO L85 PathProgramCache]: Analyzing trace with hash -2018430215, now seen corresponding path program 1 times [2022-11-03 02:24:21,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:24:21,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970685838] [2022-11-03 02:24:21,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:21,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:24:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:24:21,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:24:21,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970685838] [2022-11-03 02:24:21,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970685838] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:24:21,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028539532] [2022-11-03 02:24:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:21,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:24:21,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:24:21,555 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:24:21,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:24:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:21,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:24:21,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:24:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:24:21,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:24:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:24:21,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028539532] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:24:21,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:24:21,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2022-11-03 02:24:21,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156503207] [2022-11-03 02:24:21,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:24:21,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:24:21,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:24:21,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:24:21,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:24:21,668 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) [2022-11-03 02:24:21,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:24:21,702 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2022-11-03 02:24:21,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:24:21,703 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 [2022-11-03 02:24:21,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:24:21,704 INFO L225 Difference]: With dead ends: 40 [2022-11-03 02:24:21,704 INFO L226 Difference]: Without dead ends: 24 [2022-11-03 02:24:21,704 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:24:21,705 INFO L413 NwaCegarLoop]: 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 [2022-11-03 02:24:21,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:24:21,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-03 02:24:21,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-11-03 02:24:21,714 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) [2022-11-03 02:24:21,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-11-03 02:24:21,715 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 21 [2022-11-03 02:24:21,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:24:21,715 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-11-03 02:24:21,715 INFO L496 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) [2022-11-03 02:24:21,715 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-11-03 02:24:21,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:24:21,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:24:21,716 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:24:21,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:24:21,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:24:21,930 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:24:21,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:24:21,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1616256613, now seen corresponding path program 1 times [2022-11-03 02:24:21,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:24:21,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100025407] [2022-11-03 02:24:21,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:21,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:24:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:24:22,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:24:22,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100025407] [2022-11-03 02:24:22,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100025407] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:24:22,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398517036] [2022-11-03 02:24:22,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:22,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:24:22,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:24:22,036 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:24:22,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:24:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:22,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:24:22,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:24:22,160 INFO L390 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 [2022-11-03 02:24:22,520 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:24:22,521 INFO L390 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 [2022-11-03 02:24:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:24:22,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:27:35,301 WARN L234 SmtUtils]: Spent 3.19m on a formula simplification. DAG size of input: 87 DAG size of output: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:28:34,882 WARN L234 SmtUtils]: Spent 59.26s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:28:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:28:34,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398517036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:34,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [117990055] [2022-11-03 02:28:34,898 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:28:34,898 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:28:34,899 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:28:34,899 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:28:34,899 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:28:34,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:34,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:34,975 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 02:28:34,975 INFO L390 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 [2022-11-03 02:28:34,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:34,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:34,995 INFO L390 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 [2022-11-03 02:28:35,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,052 INFO L390 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 [2022-11-03 02:28:35,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:28:35,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:28:35,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:35,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:28:35,422 INFO L356 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-11-03 02:28:35,423 INFO L390 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 452 treesize of output 437 [2022-11-03 02:28:35,632 INFO L390 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 [2022-11-03 02:28:36,156 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:28:37,272 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 [2022-11-03 02:28:37,272 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:28:37,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:28:37,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 10, 9] total 19 [2022-11-03 02:28:37,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886143217] [2022-11-03 02:28:37,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:28:37,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 02:28:37,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:37,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 02:28:37,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:28:37,274 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) [2022-11-03 02:28:39,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:39,070 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-11-03 02:28:39,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:28:39,071 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 [2022-11-03 02:28:39,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:39,072 INFO L225 Difference]: With dead ends: 88 [2022-11-03 02:28:39,072 INFO L226 Difference]: Without dead ends: 66 [2022-11-03 02:28:39,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 253.9s TimeCoverageRelationStatistics Valid=269, Invalid=1537, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 02:28:39,074 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 115 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-11-03 02:28:39,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 116 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 156 Invalid, 0 Unknown, 62 Unchecked, 0.4s Time] [2022-11-03 02:28:39,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-03 02:28:39,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 31. [2022-11-03 02:28:39,091 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) [2022-11-03 02:28:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-03 02:28:39,091 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 22 [2022-11-03 02:28:39,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:39,092 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-03 02:28:39,092 INFO L496 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) [2022-11-03 02:28:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-03 02:28:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 02:28:39,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:39,093 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:39,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:39,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:39,307 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:39,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:39,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1638150324, now seen corresponding path program 2 times [2022-11-03 02:28:39,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:39,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734914503] [2022-11-03 02:28:39,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:39,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:28:39,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:39,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734914503] [2022-11-03 02:28:39,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734914503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:28:39,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209053623] [2022-11-03 02:28:39,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:28:39,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:39,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:39,436 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:39,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:28:39,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:28:39,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:28:39,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:28:39,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:28:39,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:28:39,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209053623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:39,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1698228236] [2022-11-03 02:28:39,623 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:28:39,623 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:28:39,624 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:28:39,624 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:28:39,624 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:28:39,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:39,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:39,696 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-03 02:28:39,697 INFO L390 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 [2022-11-03 02:28:39,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:39,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:39,766 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 02:28:39,767 INFO L390 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 [2022-11-03 02:28:39,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:39,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:39,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:39,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:39,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:39,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:39,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:39,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:39,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:39,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:39,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:39,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:39,850 INFO L390 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 [2022-11-03 02:28:39,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:39,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:39,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:40,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:40,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:40,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:40,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:40,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:40,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:28:40,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:28:40,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:40,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:40,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:40,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:40,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:40,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:28:40,220 INFO L356 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-11-03 02:28:40,221 INFO L390 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 452 treesize of output 437 [2022-11-03 02:28:40,449 INFO L390 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 [2022-11-03 02:28:41,028 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:28:41,820 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 [2022-11-03 02:28:41,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:28:41,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:28:41,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-03 02:28:41,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693391731] [2022-11-03 02:28:41,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:28:41,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:28:41,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:41,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:28:41,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:28:41,823 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) [2022-11-03 02:28:42,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:42,094 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2022-11-03 02:28:42,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:28:42,095 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 [2022-11-03 02:28:42,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:42,095 INFO L225 Difference]: With dead ends: 110 [2022-11-03 02:28:42,096 INFO L226 Difference]: Without dead ends: 83 [2022-11-03 02:28:42,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:28:42,097 INFO L413 NwaCegarLoop]: 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:42,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 70 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:28:42,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-03 02:28:42,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 34. [2022-11-03 02:28:42,123 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) [2022-11-03 02:28:42,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-11-03 02:28:42,124 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 24 [2022-11-03 02:28:42,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:42,125 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-11-03 02:28:42,125 INFO L496 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) [2022-11-03 02:28:42,125 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-11-03 02:28:42,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 02:28:42,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:42,126 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:42,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-03 02:28:42,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:28:42,351 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:42,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:42,351 INFO L85 PathProgramCache]: Analyzing trace with hash 2125385662, now seen corresponding path program 3 times [2022-11-03 02:28:42,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:42,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493382446] [2022-11-03 02:28:42,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:42,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:28:42,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:42,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493382446] [2022-11-03 02:28:42,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493382446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:28:42,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371648305] [2022-11-03 02:28:42,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:28:42,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:42,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:42,471 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:42,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:28:42,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:28:42,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:28:42,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:28:42,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:42,574 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:28:42,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:28:42,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371648305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:42,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2114627793] [2022-11-03 02:28:42,599 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:28:42,599 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:28:42,600 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:28:42,600 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:28:42,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:28:42,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,672 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 02:28:42,672 INFO L390 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 [2022-11-03 02:28:42,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,694 INFO L390 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 [2022-11-03 02:28:42,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,756 INFO L390 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 [2022-11-03 02:28:42,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:28:42,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:42,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:28:43,087 INFO L356 Elim1Store]: treesize reduction 706, result has 7.6 percent of original size [2022-11-03 02:28:43,088 INFO L390 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 501 treesize of output 442 [2022-11-03 02:28:43,169 INFO L390 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 [2022-11-03 02:28:43,657 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:28:44,884 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 [2022-11-03 02:28:44,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:28:44,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:28:44,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-11-03 02:28:44,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856330090] [2022-11-03 02:28:44,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:28:44,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:28:44,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:44,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:28:44,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:28:44,887 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) [2022-11-03 02:28:45,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:45,021 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-11-03 02:28:45,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:28:45,021 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 [2022-11-03 02:28:45,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:45,022 INFO L225 Difference]: With dead ends: 53 [2022-11-03 02:28:45,022 INFO L226 Difference]: Without dead ends: 35 [2022-11-03 02:28:45,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:28:45,023 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-03 02:28:45,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 55 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:28:45,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-03 02:28:45,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2022-11-03 02:28:45,050 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) [2022-11-03 02:28:45,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-03 02:28:45,051 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 27 [2022-11-03 02:28:45,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:45,051 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-03 02:28:45,051 INFO L496 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) [2022-11-03 02:28:45,051 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-03 02:28:45,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 02:28:45,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:45,061 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:45,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:45,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 02:28:45,287 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:45,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:45,287 INFO L85 PathProgramCache]: Analyzing trace with hash -2006983306, now seen corresponding path program 4 times [2022-11-03 02:28:45,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:45,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406905024] [2022-11-03 02:28:45,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:45,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:28:51,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:51,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406905024] [2022-11-03 02:28:51,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406905024] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:28:51,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296856731] [2022-11-03 02:28:51,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:28:51,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:51,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:51,907 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:51,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:28:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:52,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-03 02:28:52,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:53,195 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:28:53,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 88 [2022-11-03 02:28:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:28:53,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:56,653 INFO L356 Elim1Store]: treesize reduction 157, result has 42.5 percent of original size [2022-11-03 02:28:56,653 INFO L390 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 505 treesize of output 368 [2022-11-03 02:29:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:29:01,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296856731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:29:01,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1223530658] [2022-11-03 02:29:01,145 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:29:01,145 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:29:01,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:29:01,146 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:29:01,146 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:29:01,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,205 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-03 02:29:01,205 INFO L390 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 [2022-11-03 02:29:01,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,264 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 02:29:01,265 INFO L390 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 [2022-11-03 02:29:01,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,318 INFO L390 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 [2022-11-03 02:29:01,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:01,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:01,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:01,628 INFO L356 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-11-03 02:29:01,629 INFO L390 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 452 treesize of output 437 [2022-11-03 02:29:01,778 INFO L390 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 [2022-11-03 02:29:02,285 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:29:04,055 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2606#(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 [2022-11-03 02:29:04,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:29:04,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:29:04,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 11] total 40 [2022-11-03 02:29:04,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80185765] [2022-11-03 02:29:04,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:29:04,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:29:04,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:29:04,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:29:04,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2507, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 02:29:04,058 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 40 states, 40 states have (on average 1.775) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:46,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:46,018 INFO L93 Difference]: Finished difference Result 173 states and 226 transitions. [2022-11-03 02:29:46,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-03 02:29:46,020 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-11-03 02:29:46,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:46,021 INFO L225 Difference]: With dead ends: 173 [2022-11-03 02:29:46,022 INFO L226 Difference]: Without dead ends: 144 [2022-11-03 02:29:46,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4804 ImplicationChecksByTransitivity, 44.8s TimeCoverageRelationStatistics Valid=1785, Invalid=13221, Unknown=0, NotChecked=0, Total=15006 [2022-11-03 02:29:46,027 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 426 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:46,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 204 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-03 02:29:46,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-03 02:29:46,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 46. [2022-11-03 02:29:46,068 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) [2022-11-03 02:29:46,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-11-03 02:29:46,069 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 28 [2022-11-03 02:29:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:46,070 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-11-03 02:29:46,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:46,070 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-11-03 02:29:46,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 02:29:46,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:46,071 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:46,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:46,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:46,291 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:46,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:46,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1785196442, now seen corresponding path program 5 times [2022-11-03 02:29:46,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:29:46,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584702547] [2022-11-03 02:29:46,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:46,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:29:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:29:47,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:29:47,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584702547] [2022-11-03 02:29:47,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584702547] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:29:47,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750830461] [2022-11-03 02:29:47,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:29:47,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:47,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:47,390 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:47,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:29:47,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:29:47,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:29:47,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:29:47,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:47,802 INFO L390 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 [2022-11-03 02:29:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:29:47,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:29:48,095 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 02:29:48,096 INFO L390 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 22 treesize of output 13 [2022-11-03 02:29:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:29:48,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750830461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:29:48,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1037985730] [2022-11-03 02:29:48,150 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:29:48,150 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:29:48,151 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:29:48,151 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:29:48,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:29:48,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,208 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-03 02:29:48,208 INFO L390 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 [2022-11-03 02:29:48,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,259 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 02:29:48,259 INFO L390 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 [2022-11-03 02:29:48,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,303 INFO L390 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 [2022-11-03 02:29:48,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:48,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:48,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:48,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:48,588 INFO L356 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-11-03 02:29:48,588 INFO L390 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 452 treesize of output 437 [2022-11-03 02:29:48,712 INFO L390 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 [2022-11-03 02:29:49,122 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:29:50,376 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3343#(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 [2022-11-03 02:29:50,376 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:29:50,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:29:50,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 13] total 28 [2022-11-03 02:29:50,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792062469] [2022-11-03 02:29:50,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:29:50,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:29:50,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:29:50,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:29:50,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1419, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 02:29:50,379 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:54,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:54,090 INFO L93 Difference]: Finished difference Result 166 states and 203 transitions. [2022-11-03 02:29:54,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-03 02:29:54,091 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 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 33 [2022-11-03 02:29:54,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:54,092 INFO L225 Difference]: With dead ends: 166 [2022-11-03 02:29:54,092 INFO L226 Difference]: Without dead ends: 115 [2022-11-03 02:29:54,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2218 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1128, Invalid=5514, Unknown=0, NotChecked=0, Total=6642 [2022-11-03 02:29:54,098 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 319 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:54,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 123 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:29:54,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-03 02:29:54,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 50. [2022-11-03 02:29:54,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 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) [2022-11-03 02:29:54,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2022-11-03 02:29:54,132 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 33 [2022-11-03 02:29:54,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:54,132 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2022-11-03 02:29:54,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:54,133 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2022-11-03 02:29:54,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:29:54,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:54,134 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:54,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:54,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 02:29:54,358 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:54,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:54,359 INFO L85 PathProgramCache]: Analyzing trace with hash 2112038823, now seen corresponding path program 6 times [2022-11-03 02:29:54,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:29:54,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169049921] [2022-11-03 02:29:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:54,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:29:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:29:55,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:29:55,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169049921] [2022-11-03 02:29:55,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169049921] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:29:55,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078976169] [2022-11-03 02:29:55,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:29:55,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:55,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:55,127 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:55,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:29:55,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:29:55,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:29:55,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:29:55,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:55,513 INFO L390 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 [2022-11-03 02:29:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:29:55,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:29:55,762 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 02:29:55,762 INFO L390 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 50 treesize of output 32 [2022-11-03 02:29:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:29:55,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078976169] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:29:55,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [303848943] [2022-11-03 02:29:55,819 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:29:55,820 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:29:55,820 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:29:55,820 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:29:55,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:29:55,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:55,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:55,886 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-03 02:29:55,886 INFO L390 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 [2022-11-03 02:29:55,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:55,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:55,938 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 02:29:55,938 INFO L390 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 [2022-11-03 02:29:55,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:55,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:55,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:55,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:55,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:55,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:55,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:55,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:55,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:55,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:55,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:55,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:55,991 INFO L390 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 [2022-11-03 02:29:56,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:56,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:56,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:56,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:56,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:56,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:56,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:56,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:56,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:56,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:56,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:56,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:56,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:56,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:56,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:56,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:56,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:56,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:56,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:56,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:56,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:56,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:56,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:56,321 INFO L356 Elim1Store]: treesize reduction 706, result has 7.6 percent of original size [2022-11-03 02:29:56,322 INFO L390 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 501 treesize of output 442 [2022-11-03 02:29:56,404 INFO L390 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 [2022-11-03 02:29:56,796 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:29:57,924 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4021#(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 [2022-11-03 02:29:57,924 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:29:57,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:29:57,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 11] total 23 [2022-11-03 02:29:57,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757690799] [2022-11-03 02:29:57,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:29:57,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 02:29:57,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:29:57,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 02:29:57,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:29:57,926 INFO L87 Difference]: Start difference. First operand 50 states and 56 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) [2022-11-03 02:29:58,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:58,413 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2022-11-03 02:29:58,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:29:58,414 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 [2022-11-03 02:29:58,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:58,415 INFO L225 Difference]: With dead ends: 67 [2022-11-03 02:29:58,415 INFO L226 Difference]: Without dead ends: 63 [2022-11-03 02:29:58,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=242, Invalid=1480, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:29:58,416 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 59 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:58,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 105 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 310 Invalid, 0 Unknown, 30 Unchecked, 0.3s Time] [2022-11-03 02:29:58,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-03 02:29:58,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2022-11-03 02:29:58,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:58,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-11-03 02:29:58,461 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 34 [2022-11-03 02:29:58,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:58,461 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-11-03 02:29:58,462 INFO L496 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) [2022-11-03 02:29:58,462 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-11-03 02:29:58,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 02:29:58,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:58,465 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:58,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:58,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:29:58,681 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:58,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:58,682 INFO L85 PathProgramCache]: Analyzing trace with hash 151018505, now seen corresponding path program 7 times [2022-11-03 02:29:58,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:29:58,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194441395] [2022-11-03 02:29:58,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:58,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:29:58,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:30:22,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:22,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194441395] [2022-11-03 02:30:22,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194441395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:22,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860544160] [2022-11-03 02:30:22,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:30:22,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:22,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:22,568 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:22,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:30:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:22,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-03 02:30:22,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:22,806 INFO L390 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 10 treesize of output 8 [2022-11-03 02:30:22,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-03 02:30:22,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-03 02:30:23,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:23,086 INFO L390 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 30 treesize of output 32 [2022-11-03 02:30:23,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:23,194 INFO L390 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 30 treesize of output 32 [2022-11-03 02:30:23,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:23,299 INFO L390 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 30 treesize of output 32 [2022-11-03 02:30:29,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:29,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 516 treesize of output 240 [2022-11-03 02:30:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:29,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:31:10,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860544160] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:10,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [307775380] [2022-11-03 02:31:10,223 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:31:10,224 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:10,224 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:10,224 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:10,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:10,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,273 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-03 02:31:10,273 INFO L390 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 [2022-11-03 02:31:10,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,324 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 02:31:10,324 INFO L390 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 [2022-11-03 02:31:10,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,373 INFO L390 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 [2022-11-03 02:31:10,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:10,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:10,700 INFO L356 Elim1Store]: treesize reduction 706, result has 7.6 percent of original size [2022-11-03 02:31:10,700 INFO L390 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 501 treesize of output 442 [2022-11-03 02:31:10,782 INFO L390 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 [2022-11-03 02:31:11,224 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:14,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4531#(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 [2022-11-03 02:31:14,337 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:31:14,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:31:14,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 30, 19] total 71 [2022-11-03 02:31:14,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395391227] [2022-11-03 02:31:14,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:14,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-03 02:31:14,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:14,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-03 02:31:14,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=6525, Unknown=0, NotChecked=0, Total=6972 [2022-11-03 02:31:14,342 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 71 states, 71 states have (on average 1.4507042253521127) internal successors, (103), 71 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:32:30,234 WARN L234 SmtUtils]: Spent 5.21s on a formula simplification. DAG size of input: 422 DAG size of output: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:33:36,603 WARN L234 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 422 DAG size of output: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:33:46,887 WARN L234 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 422 DAG size of output: 147 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:35:49,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:49,483 INFO L93 Difference]: Finished difference Result 232 states and 245 transitions. [2022-11-03 02:35:49,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-11-03 02:35:49,483 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.4507042253521127) internal successors, (103), 71 states have internal predecessors, (103), 0 states have call successors, (0), 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 [2022-11-03 02:35:49,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:49,485 INFO L225 Difference]: With dead ends: 232 [2022-11-03 02:35:49,485 INFO L226 Difference]: Without dead ends: 208 [2022-11-03 02:35:49,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10253 ImplicationChecksByTransitivity, 285.7s TimeCoverageRelationStatistics Valid=2314, Invalid=28486, Unknown=0, NotChecked=0, Total=30800 [2022-11-03 02:35:49,492 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 654 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 2813 mSolverCounterSat, 568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 3381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 568 IncrementalHoareTripleChecker+Valid, 2813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:49,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 616 Invalid, 3381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [568 Valid, 2813 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2022-11-03 02:35:49,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-03 02:35:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 69. [2022-11-03 02:35:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2022-11-03 02:35:49,577 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 39 [2022-11-03 02:35:49,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:49,578 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2022-11-03 02:35:49,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.4507042253521127) internal successors, (103), 71 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:49,578 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2022-11-03 02:35:49,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 02:35:49,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:49,579 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:49,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:49,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:49,784 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:49,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:49,784 INFO L85 PathProgramCache]: Analyzing trace with hash -789768213, now seen corresponding path program 8 times [2022-11-03 02:35:49,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:49,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368329018] [2022-11-03 02:35:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:49,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:35:50,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:50,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368329018] [2022-11-03 02:35:50,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368329018] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:50,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625209171] [2022-11-03 02:35:50,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:35:50,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:50,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:50,103 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:50,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:35:50,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:35:50,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:35:50,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:35:50,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:50,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2022-11-03 02:35:50,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2022-11-03 02:35:51,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:35:51,128 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:35:51,129 INFO L390 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 17 treesize of output 10 [2022-11-03 02:35:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:35:51,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:51,738 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 02:35:51,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625209171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:51,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1671508917] [2022-11-03 02:35:51,740 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:35:51,740 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:35:51,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:35:51,741 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:35:51,741 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:35:51,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,796 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-03 02:35:51,796 INFO L390 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 [2022-11-03 02:35:51,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,849 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 02:35:51,849 INFO L390 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 [2022-11-03 02:35:51,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,895 INFO L390 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 [2022-11-03 02:35:51,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:51,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:52,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:52,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:52,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:52,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:52,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:52,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:52,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:52,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:35:52,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:52,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:52,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:52,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:52,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:52,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:35:52,178 INFO L356 Elim1Store]: treesize reduction 706, result has 7.6 percent of original size [2022-11-03 02:35:52,179 INFO L390 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 501 treesize of output 442 [2022-11-03 02:35:52,253 INFO L390 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 [2022-11-03 02:35:52,643 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:35:54,120 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5486#(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 [2022-11-03 02:35:54,120 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:35:54,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:35:54,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 14] total 32 [2022-11-03 02:35:54,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998972578] [2022-11-03 02:35:54,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:35:54,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-03 02:35:54,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:54,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-03 02:35:54,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 02:35:54,123 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:56,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:56,184 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2022-11-03 02:35:56,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-03 02:35:56,185 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-03 02:35:56,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:56,186 INFO L225 Difference]: With dead ends: 116 [2022-11-03 02:35:56,187 INFO L226 Difference]: Without dead ends: 86 [2022-11-03 02:35:56,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=710, Invalid=5296, Unknown=0, NotChecked=0, Total=6006 [2022-11-03 02:35:56,189 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:56,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 83 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 321 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2022-11-03 02:35:56,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-03 02:35:56,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2022-11-03 02:35:56,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 74 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:56,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2022-11-03 02:35:56,297 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 39 [2022-11-03 02:35:56,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:56,297 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2022-11-03 02:35:56,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:56,298 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2022-11-03 02:35:56,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:35:56,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:56,298 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:56,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:56,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:35:56,499 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:56,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:56,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1262392551, now seen corresponding path program 9 times [2022-11-03 02:35:56,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:56,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186529579] [2022-11-03 02:35:56,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:56,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:35:58,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:58,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186529579] [2022-11-03 02:35:58,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186529579] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:58,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618927069] [2022-11-03 02:35:58,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:35:58,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:58,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:58,178 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:58,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:35:58,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:35:58,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:35:58,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:35:58,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:58,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:35:58,972 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:35:58,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 27 [2022-11-03 02:35:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:35:58,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:59,264 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 02:35:59,265 INFO L390 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 [2022-11-03 02:35:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 02:35:59,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618927069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:59,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [494384984] [2022-11-03 02:35:59,337 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:35:59,337 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:35:59,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:35:59,337 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:35:59,338 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:35:59,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,392 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-03 02:35:59,392 INFO L390 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 [2022-11-03 02:35:59,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,441 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 02:35:59,442 INFO L390 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 [2022-11-03 02:35:59,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,484 INFO L390 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 [2022-11-03 02:35:59,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:35:59,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:35:59,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:59,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:35:59,739 INFO L356 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-11-03 02:35:59,740 INFO L390 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 452 treesize of output 437 [2022-11-03 02:35:59,863 INFO L390 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 [2022-11-03 02:36:00,277 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:36:02,370 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6186#(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 [2022-11-03 02:36:02,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:36:02,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:36:02,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 31 [2022-11-03 02:36:02,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051006969] [2022-11-03 02:36:02,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:36:02,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 02:36:02,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:02,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 02:36:02,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1689, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 02:36:02,373 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:03,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:03,330 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2022-11-03 02:36:03,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:36:03,330 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-03 02:36:03,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:03,331 INFO L225 Difference]: With dead ends: 101 [2022-11-03 02:36:03,331 INFO L226 Difference]: Without dead ends: 70 [2022-11-03 02:36:03,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=294, Invalid=2156, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 02:36:03,332 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 98 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:03,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 149 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 393 Invalid, 0 Unknown, 52 Unchecked, 0.4s Time] [2022-11-03 02:36:03,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-03 02:36:03,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-11-03 02:36:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.109375) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2022-11-03 02:36:03,420 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 44 [2022-11-03 02:36:03,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:03,421 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2022-11-03 02:36:03,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:03,421 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2022-11-03 02:36:03,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:36:03,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:03,422 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:03,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:03,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:36:03,623 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:03,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:03,623 INFO L85 PathProgramCache]: Analyzing trace with hash 609765560, now seen corresponding path program 10 times [2022-11-03 02:36:03,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:03,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10398482] [2022-11-03 02:36:03,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:03,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:36:04,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:04,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10398482] [2022-11-03 02:36:04,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10398482] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:36:04,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893101154] [2022-11-03 02:36:04,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:36:04,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:04,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:04,726 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:04,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 02:36:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:04,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:36:04,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:05,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:36:05,189 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:36:05,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 28 [2022-11-03 02:36:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-03 02:36:05,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:05,482 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 02:36:05,482 INFO L390 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 50 treesize of output 32 [2022-11-03 02:36:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:36:05,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893101154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:05,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [903440501] [2022-11-03 02:36:05,553 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:36:05,553 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:36:05,553 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:36:05,553 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:36:05,553 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:36:05,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,618 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-03 02:36:05,619 INFO L390 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 [2022-11-03 02:36:05,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,671 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 02:36:05,672 INFO L390 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 [2022-11-03 02:36:05,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,712 INFO L390 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 [2022-11-03 02:36:05,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:36:05,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:05,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:36:06,071 INFO L356 Elim1Store]: treesize reduction 706, result has 7.6 percent of original size [2022-11-03 02:36:06,072 INFO L390 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 501 treesize of output 442 [2022-11-03 02:36:06,154 INFO L390 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 [2022-11-03 02:36:06,576 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:36:07,861 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6786#(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 [2022-11-03 02:36:07,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:36:07,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:36:07,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 11] total 25 [2022-11-03 02:36:07,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634854857] [2022-11-03 02:36:07,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:36:07,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 02:36:07,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:07,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 02:36:07,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:36:07,865 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:08,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:08,405 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2022-11-03 02:36:08,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:36:08,405 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-03 02:36:08,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:08,406 INFO L225 Difference]: With dead ends: 87 [2022-11-03 02:36:08,406 INFO L226 Difference]: Without dead ends: 83 [2022-11-03 02:36:08,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:36:08,407 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 93 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:08,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 125 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 414 Invalid, 0 Unknown, 39 Unchecked, 0.3s Time] [2022-11-03 02:36:08,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-03 02:36:08,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2022-11-03 02:36:08,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 55 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) [2022-11-03 02:36:08,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-11-03 02:36:08,469 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 45 [2022-11-03 02:36:08,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:08,470 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-11-03 02:36:08,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:08,470 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-11-03 02:36:08,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:36:08,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:08,471 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:08,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:08,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:36:08,672 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:08,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:08,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2120964908, now seen corresponding path program 11 times [2022-11-03 02:36:08,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:08,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919336798] [2022-11-03 02:36:08,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:08,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-03 02:36:09,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:09,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919336798] [2022-11-03 02:36:09,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919336798] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:36:09,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844084734] [2022-11-03 02:36:09,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:36:09,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:09,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:09,126 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:09,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 02:36:09,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 02:36:09,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:36:09,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 02:36:09,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:09,816 INFO L390 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 17 treesize of output 13 [2022-11-03 02:36:10,024 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:36:10,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 62 [2022-11-03 02:36:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-03 02:36:10,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 02:36:11,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844084734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:11,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [670443780] [2022-11-03 02:36:11,474 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:36:11,474 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:36:11,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:36:11,475 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:36:11,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:36:11,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,531 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 02:36:11,531 INFO L390 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 [2022-11-03 02:36:11,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,555 INFO L390 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 [2022-11-03 02:36:11,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,597 INFO L390 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 [2022-11-03 02:36:11,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:36:11,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:36:11,973 INFO L356 Elim1Store]: treesize reduction 706, result has 7.6 percent of original size [2022-11-03 02:36:11,974 INFO L390 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 501 treesize of output 442 [2022-11-03 02:36:12,058 INFO L390 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 [2022-11-03 02:36:12,525 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:36:14,387 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7358#(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 [2022-11-03 02:36:14,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:36:14,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:36:14,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 21, 16] total 42 [2022-11-03 02:36:14,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730958818] [2022-11-03 02:36:14,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:36:14,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 02:36:14,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:14,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 02:36:14,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2707, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 02:36:14,389 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:20,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:20,295 INFO L93 Difference]: Finished difference Result 171 states and 181 transitions. [2022-11-03 02:36:20,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-03 02:36:20,295 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 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 46 [2022-11-03 02:36:20,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:20,295 INFO L225 Difference]: With dead ends: 171 [2022-11-03 02:36:20,296 INFO L226 Difference]: Without dead ends: 146 [2022-11-03 02:36:20,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4266 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1666, Invalid=11674, Unknown=0, NotChecked=0, Total=13340 [2022-11-03 02:36:20,297 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 426 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:20,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 189 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:36:20,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-03 02:36:20,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 67. [2022-11-03 02:36:20,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 66 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:20,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-11-03 02:36:20,390 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 46 [2022-11-03 02:36:20,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:20,390 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-11-03 02:36:20,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:20,391 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-11-03 02:36:20,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 02:36:20,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:20,391 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:20,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:20,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:20,592 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:20,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:20,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1868939880, now seen corresponding path program 12 times [2022-11-03 02:36:20,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:20,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604512734] [2022-11-03 02:36:20,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:20,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:37:55,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:37:55,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604512734] [2022-11-03 02:37:55,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604512734] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:37:55,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229694843] [2022-11-03 02:37:55,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:37:55,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:55,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:55,400 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:55,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f769c203-a01a-4bec-8945-0d59e08b0812/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 02:37:55,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:37:55,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:37:55,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-03 02:37:55,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:55,903 INFO L390 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 10 treesize of output 8 [2022-11-03 02:37:56,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-03 02:37:56,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-03 02:37:56,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-03 02:37:56,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-03 02:37:56,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23