./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_reverse_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_reverse_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V --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 cce6de3c48d80c64796d0d47269c605ab237c0f177720038579dfa7efd061db0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:50:38,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:50:38,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:50:38,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:50:38,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:50:38,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:50:38,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:50:38,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:50:38,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:50:38,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:50:38,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:50:38,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:50:38,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:50:38,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:50:38,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:50:38,694 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:50:38,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:50:38,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:50:38,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:50:38,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:50:38,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:50:38,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:50:38,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:50:38,710 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:50:38,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:50:38,717 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:50:38,717 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:50:38,719 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:50:38,720 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:50:38,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:50:38,723 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:50:38,724 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:50:38,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:50:38,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:50:38,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:50:38,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:50:38,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:50:38,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:50:38,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:50:38,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:50:38,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:50:38,733 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:50:38,763 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:50:38,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:50:38,770 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:50:38,771 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:50:38,775 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:50:38,775 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:50:38,775 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:50:38,776 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:50:38,776 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:50:38,776 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:50:38,776 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:50:38,776 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:50:38,777 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:50:38,777 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:50:38,778 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:50:38,778 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:50:38,779 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:50:38,779 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:50:38,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:50:38,780 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:50:38,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:50:38,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:50:38,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:50:38,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:50:38,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:50:38,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:50:38,781 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:50:38,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:50:38,782 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:50:38,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:50:38,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:50:38,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:50:38,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:50:38,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:50:38,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:50:38,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:50:38,784 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:50:38,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:50:38,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:50:38,785 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:50:38,785 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:50:38,785 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cce6de3c48d80c64796d0d47269c605ab237c0f177720038579dfa7efd061db0 [2021-11-23 03:50:39,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:50:39,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:50:39,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:50:39,114 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:50:39,115 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:50:39,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-examples/standard_reverse_ground.i [2021-11-23 03:50:39,198 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/data/ee0b4f9cc/71a4a3c0d4f64654a5cd0b39aa9237e9/FLAG0ac41d384 [2021-11-23 03:50:39,662 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:50:39,662 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/sv-benchmarks/c/array-examples/standard_reverse_ground.i [2021-11-23 03:50:39,669 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/data/ee0b4f9cc/71a4a3c0d4f64654a5cd0b39aa9237e9/FLAG0ac41d384 [2021-11-23 03:50:40,049 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/data/ee0b4f9cc/71a4a3c0d4f64654a5cd0b39aa9237e9 [2021-11-23 03:50:40,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:50:40,057 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:50:40,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:50:40,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:50:40,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:50:40,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:50:40" (1/1) ... [2021-11-23 03:50:40,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62fa90d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:40, skipping insertion in model container [2021-11-23 03:50:40,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:50:40" (1/1) ... [2021-11-23 03:50:40,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:50:40,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:50:40,255 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_b579983a-4891-49cd-b6e6-ca497f6555fd/sv-benchmarks/c/array-examples/standard_reverse_ground.i[816,829] [2021-11-23 03:50:40,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:50:40,283 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:50:40,294 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_b579983a-4891-49cd-b6e6-ca497f6555fd/sv-benchmarks/c/array-examples/standard_reverse_ground.i[816,829] [2021-11-23 03:50:40,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:50:40,314 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:50:40,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:40 WrapperNode [2021-11-23 03:50:40,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:50:40,315 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:50:40,316 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:50:40,316 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:50:40,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:40" (1/1) ... [2021-11-23 03:50:40,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:40" (1/1) ... [2021-11-23 03:50:40,348 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2021-11-23 03:50:40,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:50:40,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:50:40,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:50:40,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:50:40,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:40" (1/1) ... [2021-11-23 03:50:40,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:40" (1/1) ... [2021-11-23 03:50:40,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:40" (1/1) ... [2021-11-23 03:50:40,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:40" (1/1) ... [2021-11-23 03:50:40,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:40" (1/1) ... [2021-11-23 03:50:40,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:40" (1/1) ... [2021-11-23 03:50:40,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:40" (1/1) ... [2021-11-23 03:50:40,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:50:40,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:50:40,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:50:40,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:50:40,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:40" (1/1) ... [2021-11-23 03:50:40,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:50:40,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:40,407 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:50:40,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:50:40,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:50:40,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:50:40,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:50:40,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:50:40,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:50:40,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:50:40,460 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:50:40,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:50:40,532 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:50:40,534 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:50:40,713 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:50:40,748 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:50:40,749 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 03:50:40,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:50:40 BoogieIcfgContainer [2021-11-23 03:50:40,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:50:40,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:50:40,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:50:40,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:50:40,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:50:40" (1/3) ... [2021-11-23 03:50:40,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f65d252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:50:40, skipping insertion in model container [2021-11-23 03:50:40,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:40" (2/3) ... [2021-11-23 03:50:40,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f65d252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:50:40, skipping insertion in model container [2021-11-23 03:50:40,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:50:40" (3/3) ... [2021-11-23 03:50:40,778 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_reverse_ground.i [2021-11-23 03:50:40,788 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:50:40,788 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:50:40,833 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:50:40,841 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:50:40,841 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:50:40,855 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:40,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 03:50:40,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:40,860 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 03:50:40,861 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:50:40,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:40,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1598963128, now seen corresponding path program 1 times [2021-11-23 03:50:40,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:40,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21489936] [2021-11-23 03:50:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:40,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:41,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:41,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21489936] [2021-11-23 03:50:41,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21489936] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:41,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:41,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:50:41,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775273161] [2021-11-23 03:50:41,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:41,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:50:41,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:41,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:50:41,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:50:41,062 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:41,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:41,099 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2021-11-23 03:50:41,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:50:41,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 03:50:41,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:41,109 INFO L225 Difference]: With dead ends: 18 [2021-11-23 03:50:41,109 INFO L226 Difference]: Without dead ends: 10 [2021-11-23 03:50:41,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:50:41,116 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:41,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:50:41,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-23 03:50:41,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-23 03:50:41,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:41,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-23 03:50:41,150 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2021-11-23 03:50:41,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:41,151 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-23 03:50:41,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:41,151 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-23 03:50:41,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:50:41,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:41,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:41,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:50:41,154 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:50:41,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:41,159 INFO L85 PathProgramCache]: Analyzing trace with hash 757882845, now seen corresponding path program 1 times [2021-11-23 03:50:41,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:41,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894144978] [2021-11-23 03:50:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:41,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:41,255 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:41,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894144978] [2021-11-23 03:50:41,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894144978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:41,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602344872] [2021-11-23 03:50:41,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:41,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:41,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:41,261 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:41,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:50:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:41,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:50:41,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:41,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:41,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602344872] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:50:41,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1605087423] [2021-11-23 03:50:41,440 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 03:50:41,440 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:50:41,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:50:41,451 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:50:41,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:50:41,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:41,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:41,654 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 03:50:41,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 03:50:41,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:41,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:41,774 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 03:50:41,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 03:50:41,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:41,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 03:50:42,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:42,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:42,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:42,105 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 03:50:42,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 264 treesize of output 252 [2021-11-23 03:50:42,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:50:42,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:42,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:50:42,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:42,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:42,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:42,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:42,350 INFO L354 Elim1Store]: treesize reduction 72, result has 14.3 percent of original size [2021-11-23 03:50:42,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 85 [2021-11-23 03:50:42,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:42,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:50:42,430 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:50:42,571 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '104#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2021-11-23 03:50:42,572 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:50:42,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:50:42,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-23 03:50:42,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558590162] [2021-11-23 03:50:42,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:50:42,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:50:42,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:42,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:50:42,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:50:42,576 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:42,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:42,622 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2021-11-23 03:50:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:50:42,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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 8 [2021-11-23 03:50:42,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:42,624 INFO L225 Difference]: With dead ends: 23 [2021-11-23 03:50:42,624 INFO L226 Difference]: Without dead ends: 16 [2021-11-23 03:50:42,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:50:42,632 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:42,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:50:42,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-23 03:50:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-23 03:50:42,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:42,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-23 03:50:42,641 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-11-23 03:50:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:42,642 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-23 03:50:42,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:42,642 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-23 03:50:42,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 03:50:42,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:42,643 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:42,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 03:50:42,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:42,870 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:50:42,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:42,870 INFO L85 PathProgramCache]: Analyzing trace with hash 910138760, now seen corresponding path program 2 times [2021-11-23 03:50:42,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:42,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038162253] [2021-11-23 03:50:42,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:42,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:50:42,985 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:42,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038162253] [2021-11-23 03:50:42,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038162253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:42,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653574469] [2021-11-23 03:50:42,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:50:42,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:42,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:42,989 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:43,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:50:43,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:50:43,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:50:43,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 03:50:43,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:43,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 03:50:43,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2021-11-23 03:50:43,295 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-23 03:50:43,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 39 [2021-11-23 03:50:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 03:50:43,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:50:43,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653574469] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:43,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:50:43,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-23 03:50:43,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903916210] [2021-11-23 03:50:43,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:43,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:50:43,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:43,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:50:43,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:50:43,316 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:43,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:43,341 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-11-23 03:50:43,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:50:43,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 03:50:43,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:43,343 INFO L225 Difference]: With dead ends: 22 [2021-11-23 03:50:43,343 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 03:50:43,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:50:43,345 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:43,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-11-23 03:50:43,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 03:50:43,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-23 03:50:43,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:43,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-11-23 03:50:43,351 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2021-11-23 03:50:43,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:43,351 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-11-23 03:50:43,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:43,352 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-11-23 03:50:43,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 03:50:43,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:43,353 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:43,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:43,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:43,568 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:50:43,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:43,569 INFO L85 PathProgramCache]: Analyzing trace with hash -179519022, now seen corresponding path program 1 times [2021-11-23 03:50:43,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:43,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90054430] [2021-11-23 03:50:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:43,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 03:50:43,664 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:43,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90054430] [2021-11-23 03:50:43,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90054430] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:43,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170048283] [2021-11-23 03:50:43,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:43,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:43,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:43,674 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:43,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:50:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:43,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:50:43,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 03:50:43,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 03:50:43,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170048283] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:50:43,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1667081253] [2021-11-23 03:50:43,886 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:50:43,886 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:50:43,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:50:43,886 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:50:43,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:50:43,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:43,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:43,942 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 03:50:43,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 03:50:43,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:43,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:43,999 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 03:50:44,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 03:50:44,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:44,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 03:50:44,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:44,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:44,171 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 03:50:44,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 254 treesize of output 253 [2021-11-23 03:50:44,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:50:44,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:44,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:50:44,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:44,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:44,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:44,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:44,420 INFO L354 Elim1Store]: treesize reduction 72, result has 14.3 percent of original size [2021-11-23 03:50:44,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 85 [2021-11-23 03:50:44,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:44,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:50:44,537 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:50:44,707 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '396#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2021-11-23 03:50:44,707 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:50:44,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:50:44,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-23 03:50:44,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940330622] [2021-11-23 03:50:44,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:50:44,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:50:44,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:44,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:50:44,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:50:44,709 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:44,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:44,767 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-11-23 03:50:44,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:50:44,767 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) Word has length 17 [2021-11-23 03:50:44,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:44,768 INFO L225 Difference]: With dead ends: 42 [2021-11-23 03:50:44,768 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 03:50:44,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:50:44,770 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:44,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:50:44,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 03:50:44,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-23 03:50:44,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:44,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-11-23 03:50:44,778 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2021-11-23 03:50:44,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:44,778 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-11-23 03:50:44,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:44,778 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-11-23 03:50:44,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 03:50:44,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:44,779 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:44,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:44,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-23 03:50:44,993 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:50:44,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:44,993 INFO L85 PathProgramCache]: Analyzing trace with hash -830818062, now seen corresponding path program 2 times [2021-11-23 03:50:44,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:44,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199483505] [2021-11-23 03:50:44,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:44,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-23 03:50:45,148 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:45,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199483505] [2021-11-23 03:50:45,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199483505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:45,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366125796] [2021-11-23 03:50:45,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:50:45,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:45,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:45,154 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:45,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:50:45,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:50:45,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:50:45,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 03:50:45,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:45,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 03:50:45,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:50:45,359 INFO L354 Elim1Store]: treesize reduction 58, result has 17.1 percent of original size [2021-11-23 03:50:45,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 59 [2021-11-23 03:50:45,652 INFO L354 Elim1Store]: treesize reduction 265, result has 2.6 percent of original size [2021-11-23 03:50:45,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 42 [2021-11-23 03:50:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-23 03:50:45,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:45,846 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:50:45,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1314 treesize of output 1 [2021-11-23 03:50:45,876 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-23 03:50:45,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366125796] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:50:45,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [35690026] [2021-11-23 03:50:45,879 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:50:45,879 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:50:45,880 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:50:45,880 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:50:45,880 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:50:45,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:45,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:45,933 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 03:50:45,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 03:50:45,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:45,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:45,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 03:50:45,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:45,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 03:50:46,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:46,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:46,086 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 03:50:46,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 254 treesize of output 253 [2021-11-23 03:50:46,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:50:46,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:46,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-11-23 03:50:46,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:46,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:46,257 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-11-23 03:50:46,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 83 [2021-11-23 03:50:46,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:46,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:50:46,407 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:50:46,639 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '719#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2021-11-23 03:50:46,639 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:50:46,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:50:46,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 23 [2021-11-23 03:50:46,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364160935] [2021-11-23 03:50:46,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:50:46,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 03:50:46,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:46,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 03:50:46,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2021-11-23 03:50:46,642 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:47,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:47,211 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-11-23 03:50:47,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 03:50:47,211 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-23 03:50:47,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:47,212 INFO L225 Difference]: With dead ends: 54 [2021-11-23 03:50:47,212 INFO L226 Difference]: Without dead ends: 36 [2021-11-23 03:50:47,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=449, Invalid=1531, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 03:50:47,215 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:47,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 40 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2021-11-23 03:50:47,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-23 03:50:47,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-11-23 03:50:47,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:47,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-11-23 03:50:47,224 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2021-11-23 03:50:47,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:47,225 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-11-23 03:50:47,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:47,225 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-11-23 03:50:47,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 03:50:47,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:47,226 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 3, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 03:50:47,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:47,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:47,441 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:50:47,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:47,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1864862372, now seen corresponding path program 3 times [2021-11-23 03:50:47,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:47,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810965083] [2021-11-23 03:50:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:47,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-23 03:50:47,637 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:47,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810965083] [2021-11-23 03:50:47,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810965083] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:47,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829608545] [2021-11-23 03:50:47,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:50:47,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:47,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:47,639 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:47,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:50:47,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:50:47,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:50:47,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 03:50:47,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-23 03:50:47,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-23 03:50:48,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829608545] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:50:48,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1769430280] [2021-11-23 03:50:48,061 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:50:48,061 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:50:48,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:50:48,061 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:50:48,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:50:48,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:48,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:48,109 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 03:50:48,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 03:50:48,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:48,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:48,157 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 03:50:48,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 03:50:48,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:48,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 03:50:48,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:48,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:48,280 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 03:50:48,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 254 treesize of output 253 [2021-11-23 03:50:48,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:50:48,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:48,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:50:48,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:48,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:48,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:48,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:48,423 INFO L354 Elim1Store]: treesize reduction 72, result has 14.3 percent of original size [2021-11-23 03:50:48,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 85 [2021-11-23 03:50:48,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:48,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:50:48,537 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:50:48,721 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1132#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2021-11-23 03:50:48,721 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:50:48,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:50:48,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2021-11-23 03:50:48,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000691554] [2021-11-23 03:50:48,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:50:48,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 03:50:48,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:48,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 03:50:48,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=622, Unknown=0, NotChecked=0, Total=992 [2021-11-23 03:50:48,724 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:48,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:48,879 INFO L93 Difference]: Finished difference Result 82 states and 112 transitions. [2021-11-23 03:50:48,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 03:50:48,880 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-23 03:50:48,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:48,880 INFO L225 Difference]: With dead ends: 82 [2021-11-23 03:50:48,881 INFO L226 Difference]: Without dead ends: 61 [2021-11-23 03:50:48,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=622, Unknown=0, NotChecked=0, Total=992 [2021-11-23 03:50:48,882 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:48,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:50:48,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-23 03:50:48,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-11-23 03:50:48,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:48,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2021-11-23 03:50:48,897 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 33 [2021-11-23 03:50:48,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:48,897 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2021-11-23 03:50:48,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:48,898 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2021-11-23 03:50:48,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 03:50:48,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:48,900 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 3, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 03:50:48,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:49,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:49,125 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:50:49,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:49,126 INFO L85 PathProgramCache]: Analyzing trace with hash 654932360, now seen corresponding path program 4 times [2021-11-23 03:50:49,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:49,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469174497] [2021-11-23 03:50:49,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:49,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-23 03:50:49,608 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:49,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469174497] [2021-11-23 03:50:49,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469174497] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:49,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509398076] [2021-11-23 03:50:49,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:50:49,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:49,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:49,609 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:49,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:50:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:49,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 03:50:49,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-23 03:50:49,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-23 03:50:50,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509398076] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:50:50,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1321056100] [2021-11-23 03:50:50,739 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:50:50,739 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:50:50,739 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:50:50,740 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:50:50,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:50:50,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:50,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:50,789 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 03:50:50,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 03:50:50,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:50,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:50,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 03:50:50,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:50,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 03:50:50,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:50,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:50,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:50,888 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 03:50:50,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 264 treesize of output 252 [2021-11-23 03:50:50,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:50:50,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:50,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-11-23 03:50:50,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:50,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:51,010 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-11-23 03:50:51,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 83 [2021-11-23 03:50:51,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:51,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:50:51,115 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:50:51,301 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1807#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2021-11-23 03:50:51,301 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:50:51,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:50:51,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2021-11-23 03:50:51,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011814713] [2021-11-23 03:50:51,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:50:51,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-23 03:50:51,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:51,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-23 03:50:51,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1397, Invalid=1909, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 03:50:51,305 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:51,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:51,628 INFO L93 Difference]: Finished difference Result 148 states and 203 transitions. [2021-11-23 03:50:51,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-23 03:50:51,628 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-23 03:50:51,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:51,629 INFO L225 Difference]: With dead ends: 148 [2021-11-23 03:50:51,630 INFO L226 Difference]: Without dead ends: 113 [2021-11-23 03:50:51,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1397, Invalid=1909, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 03:50:51,633 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:51,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:50:51,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-23 03:50:51,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-11-23 03:50:51,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2021-11-23 03:50:51,657 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 60 [2021-11-23 03:50:51,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:51,657 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2021-11-23 03:50:51,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:51,658 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2021-11-23 03:50:51,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 03:50:51,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:51,662 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 3, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 03:50:51,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:51,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:51,897 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:50:51,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:51,898 INFO L85 PathProgramCache]: Analyzing trace with hash 246965928, now seen corresponding path program 5 times [2021-11-23 03:50:51,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:51,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896560038] [2021-11-23 03:50:51,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:51,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2557 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 1282 trivial. 0 not checked. [2021-11-23 03:50:53,194 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:53,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896560038] [2021-11-23 03:50:53,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896560038] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:53,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108961799] [2021-11-23 03:50:53,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:50:53,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:53,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:53,195 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:53,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:50:53,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 03:50:53,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:50:53,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 03:50:53,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:53,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 03:50:53,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:50:53,706 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-11-23 03:50:53,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 52 [2021-11-23 03:50:53,794 INFO L354 Elim1Store]: treesize reduction 150, result has 14.3 percent of original size [2021-11-23 03:50:53,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 86 [2021-11-23 03:50:54,330 INFO L354 Elim1Store]: treesize reduction 513, result has 1.3 percent of original size [2021-11-23 03:50:54,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 45 [2021-11-23 03:50:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2557 backedges. 145 proven. 9 refuted. 0 times theorem prover too weak. 2403 trivial. 0 not checked. [2021-11-23 03:50:54,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:54,912 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:50:54,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26532 treesize of output 1 [2021-11-23 03:50:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2557 backedges. 144 proven. 10 refuted. 0 times theorem prover too weak. 2403 trivial. 0 not checked. [2021-11-23 03:50:55,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108961799] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:50:55,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [686121908] [2021-11-23 03:50:55,021 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:50:55,022 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:50:55,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:50:55,022 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:50:55,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:50:55,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:55,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:55,059 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 03:50:55,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 03:50:55,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:55,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:55,100 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 03:50:55,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 03:50:55,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:55,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 03:50:55,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:55,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:55,200 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 03:50:55,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 254 treesize of output 253 [2021-11-23 03:50:55,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:50:55,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:55,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:50:55,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:55,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:55,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:55,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:55,397 INFO L354 Elim1Store]: treesize reduction 72, result has 14.3 percent of original size [2021-11-23 03:50:55,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 85 [2021-11-23 03:50:55,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:55,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:50:55,517 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:50:55,818 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3044#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2021-11-23 03:50:55,818 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:50:55,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:50:55,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 9, 9] total 67 [2021-11-23 03:50:55,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000164269] [2021-11-23 03:50:55,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:50:55,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-23 03:50:55,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:55,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-23 03:50:55,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1616, Invalid=3496, Unknown=0, NotChecked=0, Total=5112 [2021-11-23 03:50:55,823 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 67 states, 67 states have (on average 1.3432835820895523) internal successors, (90), 67 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:57,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:57,789 INFO L93 Difference]: Finished difference Result 178 states and 183 transitions. [2021-11-23 03:50:57,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-23 03:50:57,789 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.3432835820895523) internal successors, (90), 67 states have internal predecessors, (90), 0 states have call successors, (0), 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 112 [2021-11-23 03:50:57,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:57,793 INFO L225 Difference]: With dead ends: 178 [2021-11-23 03:50:57,793 INFO L226 Difference]: Without dead ends: 117 [2021-11-23 03:50:57,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 315 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2787 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4872, Invalid=11640, Unknown=0, NotChecked=0, Total=16512 [2021-11-23 03:50:57,800 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:57,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 29 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2021-11-23 03:50:57,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-23 03:50:57,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-11-23 03:50:57,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2021-11-23 03:50:57,850 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 112 [2021-11-23 03:50:57,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:57,850 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2021-11-23 03:50:57,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.3432835820895523) internal successors, (90), 67 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:57,851 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2021-11-23 03:50:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 03:50:57,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:57,859 INFO L514 BasicCegarLoop]: trace histogram [51, 50, 4, 3, 3, 1, 1, 1, 1, 1] [2021-11-23 03:50:57,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:58,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 03:50:58,070 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:50:58,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:58,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1168344758, now seen corresponding path program 6 times [2021-11-23 03:50:58,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:58,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95103782] [2021-11-23 03:50:58,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:58,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2616 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2021-11-23 03:50:59,361 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:59,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95103782] [2021-11-23 03:50:59,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95103782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:59,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134644427] [2021-11-23 03:50:59,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:50:59,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:59,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:59,363 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:59,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:50:59,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:50:59,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:50:59,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-23 03:50:59,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2616 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2021-11-23 03:50:59,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2616 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2021-11-23 03:51:02,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134644427] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:02,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2109502615] [2021-11-23 03:51:02,707 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:51:02,707 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:51:02,707 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:51:02,708 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:51:02,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:51:02,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:02,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:02,747 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 03:51:02,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 03:51:02,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:02,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:02,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 03:51:02,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:02,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 03:51:02,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:02,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:02,866 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 03:51:02,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 254 treesize of output 253 [2021-11-23 03:51:02,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:51:02,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:02,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-11-23 03:51:02,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:02,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:03,009 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-11-23 03:51:03,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 83 [2021-11-23 03:51:03,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:03,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:51:03,143 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:51:03,386 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4523#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2021-11-23 03:51:03,386 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:51:03,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:51:03,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 106 [2021-11-23 03:51:03,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981760158] [2021-11-23 03:51:03,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:51:03,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-23 03:51:03,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:03,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-23 03:51:03,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5690, Invalid=6742, Unknown=0, NotChecked=0, Total=12432 [2021-11-23 03:51:03,393 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 107 states, 107 states have (on average 1.074766355140187) internal successors, (115), 106 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:04,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:04,362 INFO L93 Difference]: Finished difference Result 288 states and 398 transitions. [2021-11-23 03:51:04,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-11-23 03:51:04,362 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.074766355140187) internal successors, (115), 106 states have internal predecessors, (115), 0 states have call successors, (0), 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 116 [2021-11-23 03:51:04,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:04,365 INFO L225 Difference]: With dead ends: 288 [2021-11-23 03:51:04,365 INFO L226 Difference]: Without dead ends: 224 [2021-11-23 03:51:04,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5690, Invalid=6742, Unknown=0, NotChecked=0, Total=12432 [2021-11-23 03:51:04,370 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:04,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:51:04,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-23 03:51:04,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2021-11-23 03:51:04,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0134529147982063) internal successors, (226), 223 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:04,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 226 transitions. [2021-11-23 03:51:04,413 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 226 transitions. Word has length 116 [2021-11-23 03:51:04,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:04,413 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 226 transitions. [2021-11-23 03:51:04,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.074766355140187) internal successors, (115), 106 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:04,414 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 226 transitions. [2021-11-23 03:51:04,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-23 03:51:04,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:04,417 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 4, 3, 3, 1, 1, 1, 1, 1] [2021-11-23 03:51:04,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:04,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 03:51:04,645 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:51:04,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:04,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1434658002, now seen corresponding path program 7 times [2021-11-23 03:51:04,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:04,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828363876] [2021-11-23 03:51:04,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:04,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10935 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 5475 trivial. 0 not checked. [2021-11-23 03:51:08,727 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:08,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828363876] [2021-11-23 03:51:08,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828363876] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:51:08,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205031997] [2021-11-23 03:51:08,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:51:08,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:08,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:51:08,739 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:51:08,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 03:51:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:08,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-23 03:51:08,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10935 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 5475 trivial. 0 not checked. [2021-11-23 03:51:09,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 10935 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 5475 trivial. 0 not checked. [2021-11-23 03:51:20,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205031997] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:20,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [129105792] [2021-11-23 03:51:20,462 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:51:20,462 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:51:20,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:51:20,462 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:51:20,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:51:20,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:20,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:20,507 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 03:51:20,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 03:51:20,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:20,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:20,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 03:51:20,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:20,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 03:51:20,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:20,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:20,632 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 03:51:20,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 254 treesize of output 253 [2021-11-23 03:51:20,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:51:20,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:20,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:51:20,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:20,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:20,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:20,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:20,765 INFO L354 Elim1Store]: treesize reduction 72, result has 14.3 percent of original size [2021-11-23 03:51:20,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 85 [2021-11-23 03:51:20,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:20,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:51:20,979 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:51:21,623 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7068#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (or (and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2021-11-23 03:51:21,623 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:51:21,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:51:21,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 212 [2021-11-23 03:51:21,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106937123] [2021-11-23 03:51:21,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:51:21,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2021-11-23 03:51:21,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:21,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2021-11-23 03:51:21,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22598, Invalid=24708, Unknown=0, NotChecked=0, Total=47306 [2021-11-23 03:51:21,634 INFO L87 Difference]: Start difference. First operand 224 states and 226 transitions. Second operand has 213 states, 213 states have (on average 1.0375586854460095) internal successors, (221), 212 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:27,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:27,957 INFO L93 Difference]: Finished difference Result 554 states and 769 transitions. [2021-11-23 03:51:27,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2021-11-23 03:51:27,958 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 1.0375586854460095) internal successors, (221), 212 states have internal predecessors, (221), 0 states have call successors, (0), 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 223 [2021-11-23 03:51:27,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:27,967 INFO L225 Difference]: With dead ends: 554 [2021-11-23 03:51:27,968 INFO L226 Difference]: Without dead ends: 436 [2021-11-23 03:51:27,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 773 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1991 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=22598, Invalid=24708, Unknown=0, NotChecked=0, Total=47306 [2021-11-23 03:51:27,975 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 1444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1444 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:27,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1444 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 03:51:27,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-11-23 03:51:28,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2021-11-23 03:51:28,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.006896551724138) internal successors, (438), 435 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 438 transitions. [2021-11-23 03:51:28,075 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 438 transitions. Word has length 223 [2021-11-23 03:51:28,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:28,077 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 438 transitions. [2021-11-23 03:51:28,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 1.0375586854460095) internal successors, (221), 212 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:28,078 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 438 transitions. [2021-11-23 03:51:28,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2021-11-23 03:51:28,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:28,087 INFO L514 BasicCegarLoop]: trace histogram [210, 210, 4, 3, 3, 1, 1, 1, 1, 1] [2021-11-23 03:51:28,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:28,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:28,301 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:51:28,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:28,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1423041202, now seen corresponding path program 8 times [2021-11-23 03:51:28,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:28,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447220522] [2021-11-23 03:51:28,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:28,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 44325 backedges. 0 proven. 22155 refuted. 0 times theorem prover too weak. 22170 trivial. 0 not checked. [2021-11-23 03:51:43,580 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:43,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447220522] [2021-11-23 03:51:43,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447220522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:51:43,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274088263] [2021-11-23 03:51:43,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:51:43,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:43,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:51:43,581 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:51:43,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:51:43,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 03:51:43,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:51:43,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 03:51:43,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:43,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 03:51:47,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:51:47,342 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-11-23 03:51:47,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 52 [2021-11-23 03:51:47,511 INFO L354 Elim1Store]: treesize reduction 154, result has 14.0 percent of original size [2021-11-23 03:51:47,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 79 [2021-11-23 03:51:47,785 INFO L354 Elim1Store]: treesize reduction 279, result has 11.7 percent of original size [2021-11-23 03:51:47,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 96 treesize of output 113 [2021-11-23 03:51:49,367 INFO L354 Elim1Store]: treesize reduction 712, result has 1.0 percent of original size [2021-11-23 03:51:49,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 120 treesize of output 48 [2021-11-23 03:51:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 44325 backedges. 1029 proven. 645 refuted. 0 times theorem prover too weak. 42651 trivial. 0 not checked. [2021-11-23 03:51:49,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:51,760 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:51:51,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 6804192 treesize of output 1 [2021-11-23 03:51:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 44325 backedges. 828 proven. 21 refuted. 0 times theorem prover too weak. 43476 trivial. 0 not checked. [2021-11-23 03:51:52,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274088263] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:52,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1166506504] [2021-11-23 03:51:52,178 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:51:52,179 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:51:52,179 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:51:52,179 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:51:52,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:51:52,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:52,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:52,239 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 03:51:52,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 03:51:52,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:52,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:52,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 03:51:52,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:52,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 03:51:52,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:52,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:52,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:52,351 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 03:51:52,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 264 treesize of output 252 [2021-11-23 03:51:52,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:51:52,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:52,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:51:52,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:52,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:52,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:52,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:52,468 INFO L354 Elim1Store]: treesize reduction 72, result has 14.3 percent of original size [2021-11-23 03:51:52,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 85 [2021-11-23 03:51:52,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:52,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:51:52,613 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:51:53,608 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11863#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2021-11-23 03:51:53,608 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:51:53,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:51:53,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [212, 15, 11] total 235 [2021-11-23 03:51:53,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026768017] [2021-11-23 03:51:53,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:51:53,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 235 states [2021-11-23 03:51:53,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:53,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 235 interpolants. [2021-11-23 03:51:53,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24196, Invalid=33164, Unknown=0, NotChecked=0, Total=57360 [2021-11-23 03:51:53,620 INFO L87 Difference]: Start difference. First operand 436 states and 438 transitions. Second operand has 235 states, 235 states have (on average 1.1148936170212767) internal successors, (262), 235 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:20,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:20,465 INFO L93 Difference]: Finished difference Result 668 states and 677 transitions. [2021-11-23 03:52:20,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2021-11-23 03:52:20,465 INFO L78 Accepts]: Start accepts. Automaton has has 235 states, 235 states have (on average 1.1148936170212767) internal successors, (262), 235 states have internal predecessors, (262), 0 states have call successors, (0), 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 435 [2021-11-23 03:52:20,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:20,469 INFO L225 Difference]: With dead ends: 668 [2021-11-23 03:52:20,469 INFO L226 Difference]: Without dead ends: 444 [2021-11-23 03:52:20,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1737 GetRequests, 1276 SyntacticMatches, 1 SemanticMatches, 460 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31820 ImplicationChecksByTransitivity, 44.3s TimeCoverageRelationStatistics Valid=73274, Invalid=139708, Unknown=0, NotChecked=0, Total=212982 [2021-11-23 03:52:20,484 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 727 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 727 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:20,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [727 Valid, 210 Invalid, 0 Unknown, 209 Unchecked, 0.6s Time] [2021-11-23 03:52:20,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-23 03:52:20,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 440. [2021-11-23 03:52:20,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.0068337129840548) internal successors, (442), 439 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:20,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 442 transitions. [2021-11-23 03:52:20,568 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 442 transitions. Word has length 435 [2021-11-23 03:52:20,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:20,569 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 442 transitions. [2021-11-23 03:52:20,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 235 states, 235 states have (on average 1.1148936170212767) internal successors, (262), 235 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:20,570 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 442 transitions. [2021-11-23 03:52:20,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-11-23 03:52:20,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:20,579 INFO L514 BasicCegarLoop]: trace histogram [211, 210, 5, 4, 4, 1, 1, 1, 1, 1] [2021-11-23 03:52:20,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:52:20,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:52:20,805 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:20,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:20,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1653668892, now seen corresponding path program 9 times [2021-11-23 03:52:20,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:20,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995232317] [2021-11-23 03:52:20,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:20,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 44547 backedges. 0 proven. 22366 refuted. 0 times theorem prover too weak. 22181 trivial. 0 not checked. [2021-11-23 03:52:36,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:36,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995232317] [2021-11-23 03:52:36,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995232317] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:52:36,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318897917] [2021-11-23 03:52:36,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:52:36,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:52:36,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:52:36,394 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:52:36,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 03:52:36,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:52:36,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:52:36,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 2209 conjuncts, 213 conjunts are in the unsatisfiable core [2021-11-23 03:52:36,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:52:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 44547 backedges. 0 proven. 22366 refuted. 0 times theorem prover too weak. 22181 trivial. 0 not checked. [2021-11-23 03:52:37,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:53:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 44547 backedges. 0 proven. 22366 refuted. 0 times theorem prover too weak. 22181 trivial. 0 not checked. [2021-11-23 03:53:21,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318897917] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:53:21,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [263050218] [2021-11-23 03:53:21,864 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:53:21,864 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:53:21,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:53:21,865 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:53:21,865 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:53:21,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:21,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:21,908 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 03:53:21,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 03:53:21,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:21,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:21,952 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 03:53:21,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 03:53:21,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:21,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 03:53:22,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:22,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:22,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:22,047 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 03:53:22,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 264 treesize of output 252 [2021-11-23 03:53:22,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:53:22,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:22,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-11-23 03:53:22,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:22,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:22,153 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-11-23 03:53:22,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 83 [2021-11-23 03:53:22,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:22,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:53:22,266 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:53:23,262 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17550#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2021-11-23 03:53:23,263 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:53:23,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:53:23,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [213, 213, 213] total 426 [2021-11-23 03:53:23,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719056041] [2021-11-23 03:53:23,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:53:23,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 427 states [2021-11-23 03:53:23,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:53:23,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 427 interpolants. [2021-11-23 03:53:23,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90970, Invalid=95222, Unknown=0, NotChecked=0, Total=186192 [2021-11-23 03:53:23,291 INFO L87 Difference]: Start difference. First operand 440 states and 442 transitions. Second operand has 427 states, 427 states have (on average 1.018735362997658) internal successors, (435), 426 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:51,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:51,251 INFO L93 Difference]: Finished difference Result 1094 states and 1524 transitions. [2021-11-23 03:54:51,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 426 states. [2021-11-23 03:54:51,252 INFO L78 Accepts]: Start accepts. Automaton has has 427 states, 427 states have (on average 1.018735362997658) internal successors, (435), 426 states have internal predecessors, (435), 0 states have call successors, (0), 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 439 [2021-11-23 03:54:51,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:51,257 INFO L225 Difference]: With dead ends: 1094 [2021-11-23 03:54:51,258 INFO L226 Difference]: Without dead ends: 867 [2021-11-23 03:54:51,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1528 GetRequests, 1098 SyntacticMatches, 0 SemanticMatches, 430 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4027 ImplicationChecksByTransitivity, 59.0s TimeCoverageRelationStatistics Valid=90970, Invalid=95222, Unknown=0, NotChecked=0, Total=186192 [2021-11-23 03:54:51,271 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 2478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 3352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2478 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:51,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 3352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2478 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 03:54:51,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-11-23 03:54:51,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 867. [2021-11-23 03:54:51,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 1.0034642032332564) internal successors, (869), 866 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:51,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 869 transitions. [2021-11-23 03:54:51,408 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 869 transitions. Word has length 439 [2021-11-23 03:54:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:51,409 INFO L470 AbstractCegarLoop]: Abstraction has 867 states and 869 transitions. [2021-11-23 03:54:51,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 427 states, 427 states have (on average 1.018735362997658) internal successors, (435), 426 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:51,410 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 869 transitions. [2021-11-23 03:54:51,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 867 [2021-11-23 03:54:51,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:51,418 INFO L514 BasicCegarLoop]: trace histogram [424, 424, 5, 4, 4, 1, 1, 1, 1, 1] [2021-11-23 03:54:51,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:51,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 03:54:51,629 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:51,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:51,630 INFO L85 PathProgramCache]: Analyzing trace with hash 209519176, now seen corresponding path program 10 times [2021-11-23 03:54:51,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:51,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687996198] [2021-11-23 03:54:51,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:51,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 180226 backedges. 0 proven. 90100 refuted. 0 times theorem prover too weak. 90126 trivial. 0 not checked. [2021-11-23 03:55:51,798 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:51,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687996198] [2021-11-23 03:55:51,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687996198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:55:51,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806532570] [2021-11-23 03:55:51,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:55:51,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:51,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:55:51,800 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:55:51,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b579983a-4891-49cd-b6e6-ca497f6555fd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 03:55:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:52,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 4343 conjuncts, 426 conjunts are in the unsatisfiable core [2021-11-23 03:55:52,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:55:53,934 INFO L134 CoverageAnalysis]: Checked inductivity of 180226 backedges. 0 proven. 90100 refuted. 0 times theorem prover too weak. 90126 trivial. 0 not checked. [2021-11-23 03:55:53,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:58:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 180226 backedges. 0 proven. 90100 refuted. 0 times theorem prover too weak. 90126 trivial. 0 not checked. [2021-11-23 03:58:51,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806532570] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:58:51,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [812309674] [2021-11-23 03:58:51,970 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:58:51,970 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:58:51,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:58:51,971 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:58:51,971 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:58:51,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:58:51,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:58:52,017 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 03:58:52,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 03:58:52,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:58:52,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:58:52,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 03:58:52,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:58:52,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 03:58:52,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:58:52,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:58:52,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:58:52,109 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 03:58:52,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 264 treesize of output 252 [2021-11-23 03:58:52,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:58:52,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:58:52,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:58:52,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:58:52,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:58:52,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:58:52,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:58:52,198 INFO L354 Elim1Store]: treesize reduction 72, result has 14.3 percent of original size [2021-11-23 03:58:52,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 85 [2021-11-23 03:58:52,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:58:52,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:58:52,302 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:58:53,640 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27485#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2021-11-23 03:58:53,640 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:58:53,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:58:53,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [426, 426, 426] total 852 [2021-11-23 03:58:53,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183894564] [2021-11-23 03:58:53,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:58:53,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 853 states [2021-11-23 03:58:53,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:58:53,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 853 interpolants. [2021-11-23 03:58:53,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363397, Invalid=371909, Unknown=0, NotChecked=0, Total=735306 [2021-11-23 03:58:53,719 INFO L87 Difference]: Start difference. First operand 867 states and 869 transitions. Second operand has 853 states, 853 states have (on average 1.0093786635404456) internal successors, (861), 852 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)