./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/sum_multi_array.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/sum_multi_array.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh --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 26771b88cbebb1b541d9a1b404bc6cc4b00331d67b70950095eb210c62a0a606 --- 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-2329fc7 [2022-12-14 08:58:52,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:58:52,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:58:52,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:58:52,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:58:52,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:58:52,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:58:52,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:58:52,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:58:52,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:58:52,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:58:52,732 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:58:52,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:58:52,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:58:52,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:58:52,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:58:52,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:58:52,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:58:52,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:58:52,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:58:52,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:58:52,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:58:52,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:58:52,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:58:52,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:58:52,745 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:58:52,745 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:58:52,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:58:52,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:58:52,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:58:52,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:58:52,748 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:58:52,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:58:52,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:58:52,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:58:52,750 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:58:52,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:58:52,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:58:52,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:58:52,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:58:52,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:58:52,753 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:58:52,768 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:58:52,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:58:52,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:58:52,769 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:58:52,770 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:58:52,770 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:58:52,770 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:58:52,770 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:58:52,770 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:58:52,770 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:58:52,771 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:58:52,771 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:58:52,771 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:58:52,771 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:58:52,771 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:58:52,771 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:58:52,771 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:58:52,772 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:58:52,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:58:52,772 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:58:52,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:58:52,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:58:52,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:58:52,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:58:52,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:58:52,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:58:52,773 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:58:52,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:58:52,774 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:58:52,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:58:52,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:58:52,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:58:52,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:58:52,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:58:52,775 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:58:52,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:58:52,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:58:52,775 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:58:52,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:58:52,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:58:52,776 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:58:52,776 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_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26771b88cbebb1b541d9a1b404bc6cc4b00331d67b70950095eb210c62a0a606 [2022-12-14 08:58:52,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:58:52,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:58:52,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:58:52,982 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:58:52,983 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:58:52,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-lopstr16/sum_multi_array.i [2022-12-14 08:58:55,644 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:58:55,780 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:58:55,780 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/sv-benchmarks/c/array-lopstr16/sum_multi_array.i [2022-12-14 08:58:55,785 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/data/5647dc690/2e2456d795204328871e5a507b966825/FLAGe71d5e5f4 [2022-12-14 08:58:55,796 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/data/5647dc690/2e2456d795204328871e5a507b966825 [2022-12-14 08:58:55,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:58:55,800 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:58:55,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:58:55,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:58:55,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:58:55,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:58:55" (1/1) ... [2022-12-14 08:58:55,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19cb0ad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:58:55, skipping insertion in model container [2022-12-14 08:58:55,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:58:55" (1/1) ... [2022-12-14 08:58:55,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:58:55,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:58:55,944 WARN L237 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_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/sv-benchmarks/c/array-lopstr16/sum_multi_array.i[808,821] [2022-12-14 08:58:55,962 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:59:05,163 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:59:05,174 WARN L237 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_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/sv-benchmarks/c/array-lopstr16/sum_multi_array.i[808,821] [2022-12-14 08:59:05,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:59:05,199 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:59:05,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:05 WrapperNode [2022-12-14 08:59:05,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:59:05,201 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:59:05,201 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:59:05,201 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:59:05,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:05" (1/1) ... [2022-12-14 08:59:05,213 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:05" (1/1) ... [2022-12-14 08:59:05,228 INFO L138 Inliner]: procedures = 15, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-12-14 08:59:05,228 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:59:05,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:59:05,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:59:05,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:59:05,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:05" (1/1) ... [2022-12-14 08:59:05,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:05" (1/1) ... [2022-12-14 08:59:05,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:05" (1/1) ... [2022-12-14 08:59:05,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:05" (1/1) ... [2022-12-14 08:59:05,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:05" (1/1) ... [2022-12-14 08:59:05,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:05" (1/1) ... [2022-12-14 08:59:05,249 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:05" (1/1) ... [2022-12-14 08:59:05,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:05" (1/1) ... [2022-12-14 08:59:05,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:59:05,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:59:05,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:59:05,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:59:05,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:05" (1/1) ... [2022-12-14 08:59:05,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:59:05,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:59:05,283 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:59:05,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:59:05,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:59:05,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:59:05,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 08:59:05,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:59:05,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:59:05,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 08:59:05,381 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:59:05,383 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:59:05,480 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:59:05,501 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:59:05,502 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 08:59:05,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:59:05 BoogieIcfgContainer [2022-12-14 08:59:05,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:59:05,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:59:05,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:59:05,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:59:05,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:58:55" (1/3) ... [2022-12-14 08:59:05,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46bed822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:59:05, skipping insertion in model container [2022-12-14 08:59:05,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:05" (2/3) ... [2022-12-14 08:59:05,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46bed822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:59:05, skipping insertion in model container [2022-12-14 08:59:05,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:59:05" (3/3) ... [2022-12-14 08:59:05,512 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_multi_array.i [2022-12-14 08:59:05,530 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:59:05,530 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:59:05,572 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:59:05,577 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;@7d5147de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:59:05,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:59:05,581 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) [2022-12-14 08:59:05,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:59:05,585 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:59:05,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 08:59:05,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:59:05,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:59:05,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1625745237, now seen corresponding path program 1 times [2022-12-14 08:59:05,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:59:05,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630915649] [2022-12-14 08:59:05,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:05,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:59:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:59:05,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:59:05,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630915649] [2022-12-14 08:59:05,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630915649] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:59:05,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:59:05,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:59:05,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969025136] [2022-12-14 08:59:05,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:59:05,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:59:05,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:59:05,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:59:05,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:59:05,763 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) [2022-12-14 08:59:05,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:59:05,803 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2022-12-14 08:59:05,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:59:05,805 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 [2022-12-14 08:59:05,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:59:05,810 INFO L225 Difference]: With dead ends: 23 [2022-12-14 08:59:05,810 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 08:59:05,812 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 [2022-12-14 08:59:05,815 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:59:05,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:59:05,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 08:59:05,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2022-12-14 08:59:05,835 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) [2022-12-14 08:59:05,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-12-14 08:59:05,836 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2022-12-14 08:59:05,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:59:05,837 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-12-14 08:59:05,837 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) [2022-12-14 08:59:05,837 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-12-14 08:59:05,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 08:59:05,837 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:59:05,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:59:05,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:59:05,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:59:05,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:59:05,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1812402306, now seen corresponding path program 1 times [2022-12-14 08:59:05,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:59:05,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007046502] [2022-12-14 08:59:05,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:05,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:59:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:59:05,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:59:05,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007046502] [2022-12-14 08:59:05,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007046502] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:59:05,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387963847] [2022-12-14 08:59:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:05,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:05,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:59:05,917 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:59:05,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:59:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:05,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:59:05,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:59:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:59:06,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:59:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:59:06,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387963847] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:59:06,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [864116123] [2022-12-14 08:59:06,043 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 08:59:06,043 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:59:06,046 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:59:06,051 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:59:06,052 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:59:06,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 34 [2022-12-14 08:59:06,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 57 [2022-12-14 08:59:06,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 49 [2022-12-14 08:59:06,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:06,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:06,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:06,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:06,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:06,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:06,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 302 treesize of output 284 [2022-12-14 08:59:06,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:06,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:06,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:06,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:06,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:06,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:06,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 285 treesize of output 279 [2022-12-14 08:59:06,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 08:59:06,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2022-12-14 08:59:06,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:06,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:06,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:06,684 INFO L321 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2022-12-14 08:59:06,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 128 [2022-12-14 08:59:06,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 08:59:06,761 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:59:06,878 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '110#(and (= |~#c~0.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |~#b~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#b~0.offset|))) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |~#b~0.offset| 0) (= 5 |~#c~0.base|) (= (ite (= (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) |ULTIMATE.start_main_#t~mem10#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= (select (select |#memory_int| |~#c~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#c~0.offset|)) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |~#b~0.base| 4) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.base| 0))' at error location [2022-12-14 08:59:06,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:59:06,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:59:06,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 08:59:06,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159361849] [2022-12-14 08:59:06,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:59:06,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:59:06,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:59:06,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:59:06,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:59:06,880 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) [2022-12-14 08:59:06,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:59:06,929 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-12-14 08:59:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:59:06,929 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 [2022-12-14 08:59:06,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:59:06,930 INFO L225 Difference]: With dead ends: 39 [2022-12-14 08:59:06,930 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 08:59:06,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:59:06,932 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:59:06,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 15 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:59:06,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 08:59:06,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 16. [2022-12-14 08:59:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:06,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-12-14 08:59:06,939 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-12-14 08:59:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:59:06,939 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-12-14 08:59:06,939 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) [2022-12-14 08:59:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-12-14 08:59:06,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 08:59:06,940 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:59:06,940 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 08:59:06,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:59:07,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:07,141 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:59:07,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:59:07,141 INFO L85 PathProgramCache]: Analyzing trace with hash -651760917, now seen corresponding path program 2 times [2022-12-14 08:59:07,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:59:07,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313178366] [2022-12-14 08:59:07,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:07,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:59:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 08:59:07,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:59:07,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313178366] [2022-12-14 08:59:07,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313178366] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:59:07,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730146494] [2022-12-14 08:59:07,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:59:07,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:07,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:59:07,304 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:59:07,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:59:07,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:59:07,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:59:07,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:59:07,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:59:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 08:59:07,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:59:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 08:59:07,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730146494] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:59:07,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [982528162] [2022-12-14 08:59:07,446 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 08:59:07,446 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:59:07,447 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:59:07,447 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:59:07,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:59:07,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 34 [2022-12-14 08:59:07,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 67 [2022-12-14 08:59:07,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 59 [2022-12-14 08:59:07,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:07,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:07,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:07,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:07,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:07,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:07,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 294 [2022-12-14 08:59:07,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:07,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:07,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:07,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:07,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:07,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:07,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 295 treesize of output 289 [2022-12-14 08:59:07,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 08:59:07,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2022-12-14 08:59:07,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:07,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:07,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:07,768 INFO L321 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2022-12-14 08:59:07,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 128 [2022-12-14 08:59:07,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 08:59:07,822 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:59:07,935 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '289#(and (= |~#c~0.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |~#b~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#b~0.offset|))) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |~#b~0.offset| 0) (= 5 |~#c~0.base|) (= (ite (= (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) |ULTIMATE.start_main_#t~mem10#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= (select (select |#memory_int| |~#c~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#c~0.offset|)) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |~#b~0.base| 4) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.base| 0))' at error location [2022-12-14 08:59:07,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:59:07,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:59:07,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 08:59:07,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399858302] [2022-12-14 08:59:07,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:59:07,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 08:59:07,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:59:07,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 08:59:07,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=147, Unknown=0, NotChecked=0, Total=272 [2022-12-14 08:59:07,938 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:08,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:59:08,025 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2022-12-14 08:59:08,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 08:59:08,025 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 08:59:08,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:59:08,027 INFO L225 Difference]: With dead ends: 84 [2022-12-14 08:59:08,027 INFO L226 Difference]: Without dead ends: 74 [2022-12-14 08:59:08,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=147, Unknown=0, NotChecked=0, Total=272 [2022-12-14 08:59:08,028 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 72 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:59:08,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 30 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:59:08,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-12-14 08:59:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 28. [2022-12-14 08:59:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-12-14 08:59:08,032 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2022-12-14 08:59:08,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:59:08,032 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-12-14 08:59:08,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:08,032 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-12-14 08:59:08,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 08:59:08,032 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:59:08,032 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2022-12-14 08:59:08,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:59:08,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:08,234 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:59:08,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:59:08,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1064936011, now seen corresponding path program 3 times [2022-12-14 08:59:08,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:59:08,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130453036] [2022-12-14 08:59:08,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:08,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:59:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 08:59:08,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:59:08,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130453036] [2022-12-14 08:59:08,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130453036] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:59:08,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897368824] [2022-12-14 08:59:08,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:59:08,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:08,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:59:08,584 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:59:08,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:59:08,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:59:08,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:59:08,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 08:59:08,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:59:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 08:59:08,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:59:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 08:59:08,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897368824] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:59:08,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [697613584] [2022-12-14 08:59:08,847 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 08:59:08,847 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:59:08,847 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:59:08,847 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:59:08,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:59:08,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 34 [2022-12-14 08:59:08,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 67 [2022-12-14 08:59:08,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 59 [2022-12-14 08:59:09,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:09,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:09,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:09,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:09,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:09,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:09,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 294 [2022-12-14 08:59:09,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:09,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:09,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:09,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:09,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:09,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:09,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 295 treesize of output 289 [2022-12-14 08:59:09,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:09,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 08:59:09,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 08:59:09,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:09,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:09,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:09,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 137 [2022-12-14 08:59:09,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 08:59:09,387 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:59:09,543 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '642#(and (= |~#c~0.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |~#b~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#b~0.offset|))) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |~#b~0.offset| 0) (= 5 |~#c~0.base|) (= (ite (= (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) |ULTIMATE.start_main_#t~mem10#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= (select (select |#memory_int| |~#c~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#c~0.offset|)) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |~#b~0.base| 4) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.base| 0))' at error location [2022-12-14 08:59:09,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:59:09,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:59:09,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-14 08:59:09,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258985719] [2022-12-14 08:59:09,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:59:09,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 08:59:09,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:59:09,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 08:59:09,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=429, Unknown=0, NotChecked=0, Total=812 [2022-12-14 08:59:09,546 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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) [2022-12-14 08:59:09,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:59:09,741 INFO L93 Difference]: Finished difference Result 174 states and 201 transitions. [2022-12-14 08:59:09,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 08:59:09,741 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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 26 [2022-12-14 08:59:09,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:59:09,742 INFO L225 Difference]: With dead ends: 174 [2022-12-14 08:59:09,743 INFO L226 Difference]: Without dead ends: 158 [2022-12-14 08:59:09,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=383, Invalid=429, Unknown=0, NotChecked=0, Total=812 [2022-12-14 08:59:09,744 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 192 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:59:09,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 66 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:59:09,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-12-14 08:59:09,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 52. [2022-12-14 08:59:09,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:09,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-12-14 08:59:09,754 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 26 [2022-12-14 08:59:09,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:59:09,754 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-12-14 08:59:09,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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) [2022-12-14 08:59:09,755 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-12-14 08:59:09,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 08:59:09,756 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:59:09,756 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2022-12-14 08:59:09,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:59:09,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:09,957 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:59:09,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:59:09,958 INFO L85 PathProgramCache]: Analyzing trace with hash 745761035, now seen corresponding path program 4 times [2022-12-14 08:59:09,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:59:09,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360877913] [2022-12-14 08:59:09,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:09,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:59:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-12-14 08:59:10,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:59:10,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360877913] [2022-12-14 08:59:10,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360877913] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:59:10,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511228703] [2022-12-14 08:59:10,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:59:10,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:10,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:59:10,890 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:59:10,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:59:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:11,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 08:59:11,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:59:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-12-14 08:59:11,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:59:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-12-14 08:59:11,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511228703] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:59:11,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [266307654] [2022-12-14 08:59:11,604 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 08:59:11,604 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:59:11,604 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:59:11,605 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:59:11,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:59:11,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 34 [2022-12-14 08:59:11,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 67 [2022-12-14 08:59:11,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 59 [2022-12-14 08:59:11,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:11,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:11,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:11,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:11,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:11,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:11,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 294 [2022-12-14 08:59:11,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:11,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:11,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:11,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:11,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:11,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:11,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 295 treesize of output 289 [2022-12-14 08:59:11,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 08:59:11,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 08:59:11,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:11,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:11,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:59:11,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 137 [2022-12-14 08:59:11,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 08:59:11,980 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:59:12,099 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1343#(and (= |~#c~0.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |~#b~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#b~0.offset|))) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |~#b~0.offset| 0) (= 5 |~#c~0.base|) (= (ite (= (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) |ULTIMATE.start_main_#t~mem10#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= (select (select |#memory_int| |~#c~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#c~0.offset|)) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |~#b~0.base| 4) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.base| 0))' at error location [2022-12-14 08:59:12,100 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:59:12,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:59:12,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-12-14 08:59:12,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918539215] [2022-12-14 08:59:12,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:59:12,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 08:59:12,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:59:12,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 08:59:12,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1425, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 08:59:12,104 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:12,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:59:12,623 INFO L93 Difference]: Finished difference Result 354 states and 405 transitions. [2022-12-14 08:59:12,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 08:59:12,623 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 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 50 [2022-12-14 08:59:12,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:59:12,625 INFO L225 Difference]: With dead ends: 354 [2022-12-14 08:59:12,625 INFO L226 Difference]: Without dead ends: 326 [2022-12-14 08:59:12,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1331, Invalid=1425, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 08:59:12,628 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 848 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:59:12,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 141 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:59:12,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-12-14 08:59:12,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 100. [2022-12-14 08:59:12,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:12,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-12-14 08:59:12,643 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 50 [2022-12-14 08:59:12,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:59:12,643 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-12-14 08:59:12,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:12,644 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-12-14 08:59:12,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 08:59:12,646 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:59:12,646 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2022-12-14 08:59:12,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 08:59:12,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:12,848 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:59:12,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:59:12,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2127538549, now seen corresponding path program 5 times [2022-12-14 08:59:12,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:59:12,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428261420] [2022-12-14 08:59:12,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:12,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:59:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-12-14 08:59:14,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:59:14,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428261420] [2022-12-14 08:59:14,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428261420] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:59:14,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794060214] [2022-12-14 08:59:14,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:59:14,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:14,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:59:14,715 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:59:14,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:10:48,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-12-14 09:10:48,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:10:48,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 09:10:48,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:10:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-12-14 09:10:48,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:10:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-12-14 09:10:50,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794060214] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:10:50,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [835189798] [2022-12-14 09:10:50,405 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 09:10:50,406 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:10:50,406 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:10:50,406 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:10:50,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:10:50,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 34 [2022-12-14 09:10:50,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 67 [2022-12-14 09:10:50,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 59 [2022-12-14 09:10:50,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:50,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:50,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:50,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:50,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:50,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:50,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 294 [2022-12-14 09:10:50,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:50,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:50,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:50,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:50,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:50,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:50,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 295 treesize of output 289 [2022-12-14 09:10:50,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:50,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 09:10:50,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 09:10:50,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:50,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:50,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:50,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 137 [2022-12-14 09:10:50,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 09:10:50,715 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:10:50,889 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2740#(and (= |~#c~0.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |~#b~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#b~0.offset|))) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |~#b~0.offset| 0) (= 5 |~#c~0.base|) (= (ite (= (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) |ULTIMATE.start_main_#t~mem10#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= (select (select |#memory_int| |~#c~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#c~0.offset|)) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |~#b~0.base| 4) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.base| 0))' at error location [2022-12-14 09:10:50,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:10:50,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:10:50,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 97 [2022-12-14 09:10:50,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501511927] [2022-12-14 09:10:50,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:10:50,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-14 09:10:50,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:50,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-14 09:10:50,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4955, Invalid=5145, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 09:10:50,898 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 97 states, 97 states have (on average 1.556701030927835) internal successors, (151), 97 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:53,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:53,415 INFO L93 Difference]: Finished difference Result 714 states and 813 transitions. [2022-12-14 09:10:53,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-14 09:10:53,416 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.556701030927835) internal successors, (151), 97 states have internal predecessors, (151), 0 states have call successors, (0), 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 98 [2022-12-14 09:10:53,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:53,420 INFO L225 Difference]: With dead ends: 714 [2022-12-14 09:10:53,420 INFO L226 Difference]: Without dead ends: 662 [2022-12-14 09:10:53,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4955, Invalid=5145, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 09:10:53,422 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1440 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1440 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:53,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1440 Valid, 285 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 09:10:53,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-12-14 09:10:53,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 196. [2022-12-14 09:10:53,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0153846153846153) internal successors, (198), 195 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:53,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2022-12-14 09:10:53,433 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 98 [2022-12-14 09:10:53,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:53,433 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2022-12-14 09:10:53,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.556701030927835) internal successors, (151), 97 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:53,434 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2022-12-14 09:10:53,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-12-14 09:10:53,435 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:53,435 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:53,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 09:10:53,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:53,637 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:10:53,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:53,638 INFO L85 PathProgramCache]: Analyzing trace with hash -175132277, now seen corresponding path program 6 times [2022-12-14 09:10:53,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:53,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596782390] [2022-12-14 09:10:53,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:53,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-12-14 09:10:58,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:58,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596782390] [2022-12-14 09:10:58,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596782390] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:10:58,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999757032] [2022-12-14 09:10:58,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:10:58,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:58,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:10:58,588 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:10:58,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:10:58,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:10:58,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:10:58,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 2515 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 09:10:58,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:10:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-12-14 09:10:59,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:11:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-12-14 09:11:06,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999757032] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:11:06,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1348582798] [2022-12-14 09:11:06,259 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 09:11:06,259 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:11:06,259 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:11:06,259 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:11:06,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:11:06,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 34 [2022-12-14 09:11:06,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 57 [2022-12-14 09:11:06,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 49 [2022-12-14 09:11:06,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:06,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:06,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:06,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:06,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:06,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:06,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 302 treesize of output 284 [2022-12-14 09:11:06,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:06,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:06,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:06,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:06,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:06,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:06,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 285 treesize of output 279 [2022-12-14 09:11:06,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:06,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 09:11:06,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 09:11:06,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:06,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:06,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:06,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 137 [2022-12-14 09:11:06,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 09:11:06,586 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:11:06,795 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5529#(and (= |~#c~0.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |~#b~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#b~0.offset|))) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |~#b~0.offset| 0) (= 5 |~#c~0.base|) (= (ite (= (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) |ULTIMATE.start_main_#t~mem10#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= (select (select |#memory_int| |~#c~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#c~0.offset|)) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |~#b~0.base| 4) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.base| 0))' at error location [2022-12-14 09:11:06,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:11:06,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:11:06,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-12-14 09:11:06,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740834448] [2022-12-14 09:11:06,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:11:06,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-12-14 09:11:06,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:11:06,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-12-14 09:11:06,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19115, Invalid=19497, Unknown=0, NotChecked=0, Total=38612 [2022-12-14 09:11:06,809 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 192 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:31,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:11:31,870 INFO L93 Difference]: Finished difference Result 1434 states and 1629 transitions. [2022-12-14 09:11:31,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-12-14 09:11:31,871 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 192 states have internal predecessors, (199), 0 states have call successors, (0), 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 194 [2022-12-14 09:11:31,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:11:31,874 INFO L225 Difference]: With dead ends: 1434 [2022-12-14 09:11:31,874 INFO L226 Difference]: Without dead ends: 1334 [2022-12-14 09:11:31,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=19115, Invalid=19497, Unknown=0, NotChecked=0, Total=38612 [2022-12-14 09:11:31,877 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3316 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 1756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3316 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 2526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1756 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:11:31,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3316 Valid, 573 Invalid, 2526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1756 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 09:11:31,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2022-12-14 09:11:31,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 388. [2022-12-14 09:11:31,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.0077519379844961) internal successors, (390), 387 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:31,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 390 transitions. [2022-12-14 09:11:31,893 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 390 transitions. Word has length 194 [2022-12-14 09:11:31,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:11:31,893 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 390 transitions. [2022-12-14 09:11:31,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 192 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:31,893 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 390 transitions. [2022-12-14 09:11:31,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-12-14 09:11:31,898 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:11:31,898 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1] [2022-12-14 09:11:31,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:11:32,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:11:32,100 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:11:32,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:11:32,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1206151051, now seen corresponding path program 7 times [2022-12-14 09:11:32,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:11:32,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284637782] [2022-12-14 09:11:32,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:11:32,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:11:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:11:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2022-12-14 09:11:53,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:11:53,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284637782] [2022-12-14 09:11:53,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284637782] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:11:53,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883223126] [2022-12-14 09:11:53,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:11:53,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:11:53,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:11:53,970 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:11:53,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34dfb0e6-84ea-48c2-a6c7-4690798eb22e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 09:11:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:11:54,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 5011 conjuncts, 192 conjunts are in the unsatisfiable core [2022-12-14 09:11:54,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:11:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2022-12-14 09:11:54,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:12:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2022-12-14 09:12:21,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883223126] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:12:21,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [238234563] [2022-12-14 09:12:21,249 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 09:12:21,249 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:12:21,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:12:21,249 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:12:21,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:12:21,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 34 [2022-12-14 09:12:21,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 67 [2022-12-14 09:12:21,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 59 [2022-12-14 09:12:21,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:21,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:21,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:21,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:21,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:21,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:21,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 294 [2022-12-14 09:12:21,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:21,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:21,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:21,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:21,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:21,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:21,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 295 treesize of output 289 [2022-12-14 09:12:21,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 09:12:21,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 09:12:21,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:21,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:21,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:21,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 137 [2022-12-14 09:12:21,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 39 [2022-12-14 09:12:21,509 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:12:21,665 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11102#(and (= |~#c~0.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |~#b~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#b~0.offset|))) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |~#b~0.offset| 0) (= 5 |~#c~0.base|) (= (ite (= (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) |ULTIMATE.start_main_#t~mem10#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= (select (select |#memory_int| |~#c~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#c~0.offset|)) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |~#b~0.base| 4) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.base| 0))' at error location [2022-12-14 09:12:21,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:12:21,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:12:21,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2022-12-14 09:12:21,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025142952] [2022-12-14 09:12:21,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:12:21,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-12-14 09:12:21,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:12:21,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-12-14 09:12:21,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75083, Invalid=75849, Unknown=0, NotChecked=0, Total=150932 [2022-12-14 09:12:21,693 INFO L87 Difference]: Start difference. First operand 388 states and 390 transitions. Second operand has 385 states, 385 states have (on average 1.0155844155844156) internal successors, (391), 384 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)