./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_two_index_09.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_two_index_09.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta --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 c10901f6cd435bfce49587e6dcf9dfedb0e3885a1bcbcf1013c88383e8232647 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:42:45,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:42:45,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:42:45,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:42:45,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:42:45,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:42:45,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:42:45,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:42:45,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:42:45,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:42:45,758 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:42:45,759 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:42:45,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:42:45,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:42:45,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:42:45,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:42:45,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:42:45,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:42:45,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:42:45,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:42:45,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:42:45,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:42:45,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:42:45,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:42:45,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:42:45,794 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:42:45,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:42:45,797 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:42:45,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:42:45,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:42:45,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:42:45,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:42:45,803 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:42:45,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:42:45,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:42:45,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:42:45,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:42:45,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:42:45,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:42:45,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:42:45,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:42:45,812 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:42:45,862 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:42:45,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:42:45,863 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:42:45,863 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:42:45,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:42:45,864 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:42:45,864 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:42:45,864 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:42:45,864 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:42:45,864 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:42:45,865 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:42:45,865 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:42:45,865 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:42:45,865 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:42:45,865 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:42:45,866 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:42:45,866 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:42:45,866 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:42:45,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:42:45,867 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:42:45,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:42:45,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:42:45,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:42:45,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:42:45,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:42:45,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:42:45,875 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:42:45,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:42:45,875 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:42:45,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:42:45,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:42:45,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:42:45,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:42:45,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:42:45,876 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:42:45,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:42:45,877 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:42:45,877 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:42:45,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:42:45,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:42:45,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:42:45,877 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c10901f6cd435bfce49587e6dcf9dfedb0e3885a1bcbcf1013c88383e8232647 [2022-10-17 17:42:46,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:42:46,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:42:46,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:42:46,200 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:42:46,201 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:42:46,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/array-examples/standard_two_index_09.i [2022-10-17 17:42:46,268 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/data/b2c29e2bc/90b4d0e391104570911a708061ba5faa/FLAG93a143e35 [2022-10-17 17:42:46,719 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:42:46,720 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/sv-benchmarks/c/array-examples/standard_two_index_09.i [2022-10-17 17:42:46,727 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/data/b2c29e2bc/90b4d0e391104570911a708061ba5faa/FLAG93a143e35 [2022-10-17 17:42:47,080 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/data/b2c29e2bc/90b4d0e391104570911a708061ba5faa [2022-10-17 17:42:47,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:42:47,084 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:42:47,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:42:47,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:42:47,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:42:47,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:42:47" (1/1) ... [2022-10-17 17:42:47,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d03d7e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:47, skipping insertion in model container [2022-10-17 17:42:47,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:42:47" (1/1) ... [2022-10-17 17:42:47,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:42:47,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:42:47,297 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_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/sv-benchmarks/c/array-examples/standard_two_index_09.i[814,827] [2022-10-17 17:42:47,313 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:42:47,320 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:42:47,333 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_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/sv-benchmarks/c/array-examples/standard_two_index_09.i[814,827] [2022-10-17 17:42:47,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:42:47,355 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:42:47,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:47 WrapperNode [2022-10-17 17:42:47,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:42:47,357 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:42:47,357 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:42:47,357 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:42:47,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:47" (1/1) ... [2022-10-17 17:42:47,372 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:47" (1/1) ... [2022-10-17 17:42:47,391 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-10-17 17:42:47,391 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:42:47,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:42:47,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:42:47,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:42:47,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:47" (1/1) ... [2022-10-17 17:42:47,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:47" (1/1) ... [2022-10-17 17:42:47,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:47" (1/1) ... [2022-10-17 17:42:47,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:47" (1/1) ... [2022-10-17 17:42:47,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:47" (1/1) ... [2022-10-17 17:42:47,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:47" (1/1) ... [2022-10-17 17:42:47,415 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:47" (1/1) ... [2022-10-17 17:42:47,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:47" (1/1) ... [2022-10-17 17:42:47,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:42:47,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:42:47,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:42:47,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:42:47,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:47" (1/1) ... [2022-10-17 17:42:47,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:42:47,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:47,478 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:42:47,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:42:47,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:42:47,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:42:47,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:42:47,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:42:47,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:42:47,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:42:47,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:42:47,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:42:47,585 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:42:47,587 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:42:47,821 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:42:47,858 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:42:47,858 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-17 17:42:47,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:42:47 BoogieIcfgContainer [2022-10-17 17:42:47,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:42:47,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:42:47,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:42:47,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:42:47,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:42:47" (1/3) ... [2022-10-17 17:42:47,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773a0469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:42:47, skipping insertion in model container [2022-10-17 17:42:47,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:47" (2/3) ... [2022-10-17 17:42:47,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773a0469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:42:47, skipping insertion in model container [2022-10-17 17:42:47,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:42:47" (3/3) ... [2022-10-17 17:42:47,870 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_09.i [2022-10-17 17:42:47,889 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:42:47,889 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:42:47,955 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:42:47,977 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@67acb7e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:42:47,978 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:42:47,982 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) [2022-10-17 17:42:47,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-17 17:42:47,993 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:48,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-17 17:42:48,004 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:48,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:48,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1745982706, now seen corresponding path program 1 times [2022-10-17 17:42:48,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:48,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005022882] [2022-10-17 17:42:48,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:48,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:48,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:48,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:48,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005022882] [2022-10-17 17:42:48,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005022882] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:48,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:48,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:42:48,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343813058] [2022-10-17 17:42:48,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:48,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:48,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:48,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:48,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:48,407 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) [2022-10-17 17:42:48,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:48,468 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2022-10-17 17:42:48,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:48,471 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 [2022-10-17 17:42:48,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:48,485 INFO L225 Difference]: With dead ends: 17 [2022-10-17 17:42:48,485 INFO L226 Difference]: Without dead ends: 9 [2022-10-17 17:42:48,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:48,494 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:48,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:42:48,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-10-17 17:42:48,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-10-17 17:42:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:48,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-10-17 17:42:48,537 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2022-10-17 17:42:48,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:48,538 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-10-17 17:42:48,539 INFO L496 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) [2022-10-17 17:42:48,540 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-10-17 17:42:48,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 17:42:48,540 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:48,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:48,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:42:48,542 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:48,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:48,545 INFO L85 PathProgramCache]: Analyzing trace with hash 276578033, now seen corresponding path program 1 times [2022-10-17 17:42:48,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:48,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290200384] [2022-10-17 17:42:48,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:48,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:48,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:48,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290200384] [2022-10-17 17:42:48,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290200384] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:48,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22971875] [2022-10-17 17:42:48,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:48,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:48,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:48,690 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:48,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:42:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:48,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:42:48,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:42:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:42:48,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:42:48,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22971875] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:48,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:42:48,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-10-17 17:42:48,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367762666] [2022-10-17 17:42:48,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:48,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:48,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:48,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:48,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:42:48,784 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:48,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:48,807 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-10-17 17:42:48,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:48,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-10-17 17:42:48,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:48,809 INFO L225 Difference]: With dead ends: 20 [2022-10-17 17:42:48,809 INFO L226 Difference]: Without dead ends: 15 [2022-10-17 17:42:48,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:42:48,811 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:48,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:42:48,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-10-17 17:42:48,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2022-10-17 17:42:48,816 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) [2022-10-17 17:42:48,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-10-17 17:42:48,817 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2022-10-17 17:42:48,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:48,817 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-10-17 17:42:48,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:48,818 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-10-17 17:42:48,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 17:42:48,818 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:48,819 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:48,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:42:49,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:49,039 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:49,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:49,040 INFO L85 PathProgramCache]: Analyzing trace with hash -51261225, now seen corresponding path program 1 times [2022-10-17 17:42:49,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:49,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224925681] [2022-10-17 17:42:49,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:49,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:42:49,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:49,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224925681] [2022-10-17 17:42:49,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224925681] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:49,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57659125] [2022-10-17 17:42:49,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:49,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:49,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:49,148 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:49,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:42:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:49,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:42:49,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:42:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:42:49,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:42:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:42:49,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57659125] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:42:49,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [745546309] [2022-10-17 17:42:49,322 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-10-17 17:42:49,323 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:42:49,328 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:42:49,334 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:42:49,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:42:49,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:49,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:49,504 INFO L356 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-10-17 17:42:49,505 INFO L390 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 [2022-10-17 17:42:49,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:49,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:49,605 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-10-17 17:42:49,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-10-17 17:42:49,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:49,738 INFO L390 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 26 treesize of output 28 [2022-10-17 17:42:50,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:50,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:42:50,075 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-10-17 17:42:50,076 INFO L390 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 248 treesize of output 247 [2022-10-17 17:42:50,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-17 17:42:50,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:50,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-10-17 17:42:50,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:50,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:50,504 INFO L356 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-10-17 17:42:50,505 INFO L390 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 6 case distinctions, treesize of input 78 treesize of output 103 [2022-10-17 17:42:50,629 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-10-17 17:42:50,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-10-17 17:42:50,652 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:42:50,833 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '164#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 36) |ULTIMATE.start_main_~#b~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:42:50,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:42:50,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:42:50,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-17 17:42:50,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085940900] [2022-10-17 17:42:50,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:42:50,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:42:50,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:50,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:42:50,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:42:50,842 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) [2022-10-17 17:42:50,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:50,897 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-10-17 17:42:50,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:42:50,897 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 [2022-10-17 17:42:50,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:50,898 INFO L225 Difference]: With dead ends: 31 [2022-10-17 17:42:50,898 INFO L226 Difference]: Without dead ends: 24 [2022-10-17 17:42:50,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:42:50,911 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:50,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:42:50,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-10-17 17:42:50,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2022-10-17 17:42:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:50,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-10-17 17:42:50,916 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-10-17 17:42:50,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:50,916 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-10-17 17:42:50,917 INFO L496 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) [2022-10-17 17:42:50,917 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-10-17 17:42:50,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 17:42:50,917 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:50,918 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:50,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:42:51,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:51,118 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:51,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:51,119 INFO L85 PathProgramCache]: Analyzing trace with hash 490227022, now seen corresponding path program 2 times [2022-10-17 17:42:51,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:51,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331106427] [2022-10-17 17:42:51,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:51,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 17:42:51,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:51,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331106427] [2022-10-17 17:42:51,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331106427] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:51,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129744736] [2022-10-17 17:42:51,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:42:51,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:51,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:51,263 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:51,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:42:51,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 17:42:51,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:42:51,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:42:51,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:42:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 17:42:51,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:42:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 17:42:51,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129744736] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:42:51,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1850319457] [2022-10-17 17:42:51,369 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-10-17 17:42:51,369 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:42:51,369 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:42:51,370 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:42:51,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:42:51,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:51,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:51,436 INFO L356 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-10-17 17:42:51,437 INFO L390 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 [2022-10-17 17:42:51,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:51,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:51,528 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-10-17 17:42:51,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-10-17 17:42:51,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:51,567 INFO L390 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 26 treesize of output 28 [2022-10-17 17:42:51,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:51,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:42:51,691 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-10-17 17:42:51,693 INFO L390 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 248 treesize of output 247 [2022-10-17 17:42:51,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-17 17:42:51,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:51,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-10-17 17:42:51,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:51,988 INFO L356 Elim1Store]: treesize reduction 109, result has 33.5 percent of original size [2022-10-17 17:42:51,988 INFO L390 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 81 treesize of output 109 [2022-10-17 17:42:52,068 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-10-17 17:42:52,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-10-17 17:42:52,082 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:42:52,231 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '312#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 36) |ULTIMATE.start_main_~#b~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:42:52,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:42:52,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:42:52,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-10-17 17:42:52,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749199780] [2022-10-17 17:42:52,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:42:52,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 17:42:52,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:52,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 17:42:52,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-10-17 17:42:52,234 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:52,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:52,315 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-10-17 17:42:52,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:42:52,316 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-17 17:42:52,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:52,319 INFO L225 Difference]: With dead ends: 54 [2022-10-17 17:42:52,320 INFO L226 Difference]: Without dead ends: 46 [2022-10-17 17:42:52,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-10-17 17:42:52,323 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:52,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 18 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:42:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-10-17 17:42:52,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 20. [2022-10-17 17:42:52,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:52,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-10-17 17:42:52,338 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2022-10-17 17:42:52,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:52,339 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-10-17 17:42:52,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:52,339 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-10-17 17:42:52,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-17 17:42:52,341 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:52,341 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:52,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:42:52,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:52,554 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:52,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:52,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1077845166, now seen corresponding path program 3 times [2022-10-17 17:42:52,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:52,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355201676] [2022-10-17 17:42:52,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:52,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 17:42:52,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:52,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355201676] [2022-10-17 17:42:52,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355201676] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:52,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353062568] [2022-10-17 17:42:52,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 17:42:52,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:52,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:52,893 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:52,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:42:52,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 17:42:52,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:42:52,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 17:42:52,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:42:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 17:42:53,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:42:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 17:42:53,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353062568] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:42:53,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [953678130] [2022-10-17 17:42:53,137 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-10-17 17:42:53,137 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:42:53,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:42:53,138 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:42:53,138 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:42:53,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:53,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:53,193 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-10-17 17:42:53,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-10-17 17:42:53,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:53,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:53,209 INFO L390 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 [2022-10-17 17:42:53,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:53,240 INFO L390 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 31 treesize of output 33 [2022-10-17 17:42:53,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:53,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:53,343 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-10-17 17:42:53,343 INFO L390 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 258 treesize of output 246 [2022-10-17 17:42:53,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-17 17:42:53,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:53,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-10-17 17:42:53,515 INFO L356 Elim1Store]: treesize reduction 119, result has 26.1 percent of original size [2022-10-17 17:42:53,516 INFO L390 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 86 treesize of output 108 [2022-10-17 17:42:53,576 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-10-17 17:42:53,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-10-17 17:42:53,591 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:42:53,778 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '556#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 36) |ULTIMATE.start_main_~#b~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:42:53,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:42:53,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:42:53,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2022-10-17 17:42:53,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501919431] [2022-10-17 17:42:53,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:42:53,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-10-17 17:42:53,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:53,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-10-17 17:42:53,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=425, Unknown=0, NotChecked=0, Total=756 [2022-10-17 17:42:53,781 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:53,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:53,911 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2022-10-17 17:42:53,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-10-17 17:42:53,922 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-10-17 17:42:53,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:53,923 INFO L225 Difference]: With dead ends: 88 [2022-10-17 17:42:53,924 INFO L226 Difference]: Without dead ends: 76 [2022-10-17 17:42:53,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=331, Invalid=425, Unknown=0, NotChecked=0, Total=756 [2022-10-17 17:42:53,925 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 79 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:53,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 42 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:42:53,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-10-17 17:42:53,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 36. [2022-10-17 17:42:53,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-10-17 17:42:53,934 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 18 [2022-10-17 17:42:53,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:53,934 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-10-17 17:42:53,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:53,935 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-10-17 17:42:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-17 17:42:53,936 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:53,936 INFO L195 NwaCegarLoop]: trace histogram [20, 8, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:53,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:42:54,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:54,150 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:54,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:54,150 INFO L85 PathProgramCache]: Analyzing trace with hash -936889138, now seen corresponding path program 4 times [2022-10-17 17:42:54,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:54,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208134519] [2022-10-17 17:42:54,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:54,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-10-17 17:42:54,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:54,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208134519] [2022-10-17 17:42:54,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208134519] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:54,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105858044] [2022-10-17 17:42:54,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-10-17 17:42:54,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:54,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:54,494 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:54,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 17:42:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:54,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 22 conjunts are in the unsatisfiable core [2022-10-17 17:42:54,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:42:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-10-17 17:42:54,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:42:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-10-17 17:42:55,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105858044] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:42:55,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2029315290] [2022-10-17 17:42:55,221 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-10-17 17:42:55,222 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:42:55,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:42:55,222 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:42:55,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:42:55,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:55,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:55,263 INFO L356 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-10-17 17:42:55,263 INFO L390 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 [2022-10-17 17:42:55,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:55,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:55,313 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-10-17 17:42:55,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-10-17 17:42:55,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:55,342 INFO L390 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 31 treesize of output 33 [2022-10-17 17:42:55,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:55,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:55,417 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-10-17 17:42:55,417 INFO L390 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 258 treesize of output 246 [2022-10-17 17:42:55,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-17 17:42:55,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:55,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-10-17 17:42:55,598 INFO L356 Elim1Store]: treesize reduction 120, result has 23.1 percent of original size [2022-10-17 17:42:55,599 INFO L390 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 5 case distinctions, treesize of input 83 treesize of output 102 [2022-10-17 17:42:55,654 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-10-17 17:42:55,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-10-17 17:42:55,666 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:42:55,840 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1012#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 36) |ULTIMATE.start_main_~#b~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:42:55,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:42:55,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:42:55,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 22, 22] total 51 [2022-10-17 17:42:55,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842824731] [2022-10-17 17:42:55,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:42:55,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-10-17 17:42:55,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:55,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-10-17 17:42:55,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1437, Invalid=1643, Unknown=0, NotChecked=0, Total=3080 [2022-10-17 17:42:55,845 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:56,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:56,127 INFO L93 Difference]: Finished difference Result 142 states and 177 transitions. [2022-10-17 17:42:56,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-10-17 17:42:56,128 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 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 34 [2022-10-17 17:42:56,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:56,129 INFO L225 Difference]: With dead ends: 142 [2022-10-17 17:42:56,130 INFO L226 Difference]: Without dead ends: 128 [2022-10-17 17:42:56,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1437, Invalid=1643, Unknown=0, NotChecked=0, Total=3080 [2022-10-17 17:42:56,132 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 199 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:56,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 72 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:42:56,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-10-17 17:42:56,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 68. [2022-10-17 17:42:56,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:56,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2022-10-17 17:42:56,145 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 34 [2022-10-17 17:42:56,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:56,145 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2022-10-17 17:42:56,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:56,146 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2022-10-17 17:42:56,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-10-17 17:42:56,148 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:56,148 INFO L195 NwaCegarLoop]: trace histogram [48, 12, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:56,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 17:42:56,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 17:42:56,366 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:56,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:56,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1875309298, now seen corresponding path program 5 times [2022-10-17 17:42:56,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:56,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464550443] [2022-10-17 17:42:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:56,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2022-10-17 17:42:57,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:57,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464550443] [2022-10-17 17:42:57,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464550443] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:57,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247596390] [2022-10-17 17:42:57,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:42:57,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:57,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:57,070 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:57,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 17:42:57,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-10-17 17:42:57,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:42:57,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-17 17:42:57,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:42:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2022-10-17 17:42:57,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:42:58,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2022-10-17 17:42:58,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247596390] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:42:58,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [452618856] [2022-10-17 17:42:58,203 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-10-17 17:42:58,203 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:42:58,203 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:42:58,203 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:42:58,204 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:42:58,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:58,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:58,256 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-10-17 17:42:58,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-10-17 17:42:58,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:58,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:58,270 INFO L390 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 [2022-10-17 17:42:58,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:58,296 INFO L390 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 31 treesize of output 33 [2022-10-17 17:42:58,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:58,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:58,387 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-10-17 17:42:58,387 INFO L390 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 258 treesize of output 246 [2022-10-17 17:42:58,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-17 17:42:58,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:58,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-10-17 17:42:58,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:58,580 INFO L356 Elim1Store]: treesize reduction 109, result has 33.5 percent of original size [2022-10-17 17:42:58,580 INFO L390 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 81 treesize of output 109 [2022-10-17 17:42:58,645 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-10-17 17:42:58,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-10-17 17:42:58,658 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:42:58,829 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1794#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 36) |ULTIMATE.start_main_~#b~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:42:58,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:42:58,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:42:58,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2022-10-17 17:42:58,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141440159] [2022-10-17 17:42:58,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:42:58,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-10-17 17:42:58,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:58,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-10-17 17:42:58,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=616, Unknown=0, NotChecked=0, Total=1122 [2022-10-17 17:42:58,832 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 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) [2022-10-17 17:42:59,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:59,093 INFO L93 Difference]: Finished difference Result 213 states and 229 transitions. [2022-10-17 17:42:59,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-10-17 17:42:59,094 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 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 66 [2022-10-17 17:42:59,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:59,096 INFO L225 Difference]: With dead ends: 213 [2022-10-17 17:42:59,096 INFO L226 Difference]: Without dead ends: 208 [2022-10-17 17:42:59,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=506, Invalid=616, Unknown=0, NotChecked=0, Total=1122 [2022-10-17 17:42:59,098 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 304 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:59,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 78 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:42:59,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-10-17 17:42:59,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 82. [2022-10-17 17:42:59,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:59,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2022-10-17 17:42:59,110 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 66 [2022-10-17 17:42:59,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:59,111 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2022-10-17 17:42:59,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 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) [2022-10-17 17:42:59,112 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2022-10-17 17:42:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-10-17 17:42:59,114 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:59,114 INFO L195 NwaCegarLoop]: trace histogram [48, 26, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:59,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 17:42:59,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:59,326 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:59,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:59,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1291366514, now seen corresponding path program 6 times [2022-10-17 17:42:59,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:59,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015558880] [2022-10-17 17:42:59,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:59,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2022-10-17 17:43:00,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:00,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015558880] [2022-10-17 17:43:00,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015558880] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:43:00,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090613948] [2022-10-17 17:43:00,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 17:43:00,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:43:00,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:43:00,546 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:43:00,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 17:43:00,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 17:43:00,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:43:00,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 50 conjunts are in the unsatisfiable core [2022-10-17 17:43:00,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:43:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-10-17 17:43:01,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:43:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-10-17 17:43:03,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090613948] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:43:03,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2137205748] [2022-10-17 17:43:03,485 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-10-17 17:43:03,485 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:43:03,485 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:43:03,485 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:43:03,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:43:03,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:03,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:03,528 INFO L356 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-10-17 17:43:03,531 INFO L390 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 [2022-10-17 17:43:03,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:03,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:03,579 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-10-17 17:43:03,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-10-17 17:43:03,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:03,603 INFO L390 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 26 treesize of output 28 [2022-10-17 17:43:03,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:03,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:43:03,683 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-10-17 17:43:03,684 INFO L390 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 248 treesize of output 247 [2022-10-17 17:43:03,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-17 17:43:03,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:03,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-10-17 17:43:03,872 INFO L356 Elim1Store]: treesize reduction 119, result has 26.1 percent of original size [2022-10-17 17:43:03,874 INFO L390 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 86 treesize of output 108 [2022-10-17 17:43:03,921 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-10-17 17:43:03,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-10-17 17:43:03,935 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:43:04,093 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2871#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 36) |ULTIMATE.start_main_~#b~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:43:04,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:43:04,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:43:04,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 50, 50] total 122 [2022-10-17 17:43:04,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272847611] [2022-10-17 17:43:04,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:43:04,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-10-17 17:43:04,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:04,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-10-17 17:43:04,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7756, Invalid=8246, Unknown=0, NotChecked=0, Total=16002 [2022-10-17 17:43:04,107 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 122 states, 122 states have (on average 1.1065573770491803) internal successors, (135), 122 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:43:05,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:43:05,242 INFO L93 Difference]: Finished difference Result 357 states and 438 transitions. [2022-10-17 17:43:05,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-10-17 17:43:05,243 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.1065573770491803) internal successors, (135), 122 states have internal predecessors, (135), 0 states have call successors, (0), 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 80 [2022-10-17 17:43:05,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:43:05,245 INFO L225 Difference]: With dead ends: 357 [2022-10-17 17:43:05,245 INFO L226 Difference]: Without dead ends: 325 [2022-10-17 17:43:05,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9039 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7756, Invalid=8246, Unknown=0, NotChecked=0, Total=16002 [2022-10-17 17:43:05,251 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 683 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:43:05,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 174 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:43:05,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-10-17 17:43:05,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 160. [2022-10-17 17:43:05,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0188679245283019) internal successors, (162), 159 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:43:05,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2022-10-17 17:43:05,269 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 80 [2022-10-17 17:43:05,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:43:05,270 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2022-10-17 17:43:05,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.1065573770491803) internal successors, (135), 122 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:43:05,270 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2022-10-17 17:43:05,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-10-17 17:43:05,273 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:05,274 INFO L195 NwaCegarLoop]: trace histogram [119, 33, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:05,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 17:43:05,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:43:05,486 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:05,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:05,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1019003145, now seen corresponding path program 7 times [2022-10-17 17:43:05,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:05,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498466016] [2022-10-17 17:43:05,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:05,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7701 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2022-10-17 17:43:07,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:07,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498466016] [2022-10-17 17:43:07,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498466016] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:43:07,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976020968] [2022-10-17 17:43:07,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-10-17 17:43:07,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:43:07,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:43:07,814 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:43:07,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f06042-a3cc-4986-8a4a-d8604e6bfcfe/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 17:43:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:08,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 121 conjunts are in the unsatisfiable core [2022-10-17 17:43:08,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:43:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7701 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-10-17 17:43:09,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:43:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7701 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-10-17 17:43:17,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976020968] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:43:17,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [218638528] [2022-10-17 17:43:17,331 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-10-17 17:43:17,332 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:43:17,332 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:43:17,332 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:43:17,333 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:43:17,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:17,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:17,382 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-10-17 17:43:17,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-10-17 17:43:17,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:17,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:17,397 INFO L390 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 [2022-10-17 17:43:17,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:17,421 INFO L390 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 31 treesize of output 33 [2022-10-17 17:43:17,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:17,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:17,491 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-10-17 17:43:17,492 INFO L390 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 258 treesize of output 246 [2022-10-17 17:43:17,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-17 17:43:17,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:17,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-10-17 17:43:17,628 INFO L356 Elim1Store]: treesize reduction 120, result has 23.1 percent of original size [2022-10-17 17:43:17,628 INFO L390 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 5 case distinctions, treesize of input 83 treesize of output 102 [2022-10-17 17:43:17,691 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-10-17 17:43:17,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-10-17 17:43:17,702 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:43:17,891 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4969#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 36) |ULTIMATE.start_main_~#b~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:43:17,891 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:43:17,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:43:17,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 121, 121] total 263 [2022-10-17 17:43:17,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487462986] [2022-10-17 17:43:17,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:43:17,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 263 states [2022-10-17 17:43:17,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:17,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 263 interpolants. [2022-10-17 17:43:17,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35251, Invalid=36305, Unknown=0, NotChecked=0, Total=71556 [2022-10-17 17:43:17,915 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 263 states, 263 states have (on average 1.079847908745247) internal successors, (284), 263 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)