./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_tiling_tcpy.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36f3953-6213-4e47-b6c2-69073a7e5431/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36f3953-6213-4e47-b6c2-69073a7e5431/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_d36f3953-6213-4e47-b6c2-69073a7e5431/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36f3953-6213-4e47-b6c2-69073a7e5431/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_tiling_tcpy.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36f3953-6213-4e47-b6c2-69073a7e5431/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_d36f3953-6213-4e47-b6c2-69073a7e5431/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 5446997f7b2d7b76d63a39784df785fb06bbab562e365ba547eeee8a855e283e --- 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 09:56:54,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:56:54,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:56:54,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:56:54,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:56:54,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:56:54,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:56:54,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:56:54,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:56:54,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:56:54,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:56:54,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:56:54,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:56:54,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:56:54,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:56:54,785 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:56:54,786 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:56:54,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:56:54,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:56:54,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:56:54,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:56:54,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:56:54,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:56:54,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:56:54,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:56:54,794 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:56:54,794 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:56:54,795 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:56:54,795 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:56:54,796 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:56:54,796 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:56:54,797 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:56:54,797 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:56:54,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:56:54,798 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:56:54,799 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:56:54,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:56:54,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:56:54,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:56:54,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:56:54,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:56:54,801 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36f3953-6213-4e47-b6c2-69073a7e5431/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:56:54,816 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:56:54,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:56:54,817 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:56:54,817 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:56:54,817 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:56:54,817 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:56:54,818 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:56:54,818 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:56:54,818 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:56:54,818 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:56:54,818 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:56:54,818 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:56:54,819 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:56:54,819 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:56:54,819 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:56:54,819 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:56:54,819 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:56:54,819 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:56:54,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:56:54,820 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:56:54,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:56:54,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:56:54,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:56:54,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:56:54,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:56:54,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:56:54,821 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:56:54,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:56:54,822 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:56:54,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:56:54,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:56:54,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:56:54,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:56:54,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:56:54,823 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:56:54,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:56:54,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:56:54,823 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:56:54,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:56:54,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:56:54,823 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:56:54,824 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_d36f3953-6213-4e47-b6c2-69073a7e5431/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36f3953-6213-4e47-b6c2-69073a7e5431/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5446997f7b2d7b76d63a39784df785fb06bbab562e365ba547eeee8a855e283e [2022-12-14 09:56:55,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:56:55,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:56:55,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:56:55,032 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:56:55,033 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:56:55,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36f3953-6213-4e47-b6c2-69073a7e5431/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-cav19/array_tiling_tcpy.c [2022-12-14 09:56:57,577 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:56:57,746 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:56:57,746 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36f3953-6213-4e47-b6c2-69073a7e5431/sv-benchmarks/c/array-cav19/array_tiling_tcpy.c [2022-12-14 09:56:57,752 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36f3953-6213-4e47-b6c2-69073a7e5431/bin/utaipan-gh47qXpMRh/data/c68f2d516/c4383cb881224e06bf26c0cea35aa902/FLAGa2fef3718 [2022-12-14 09:56:58,135 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36f3953-6213-4e47-b6c2-69073a7e5431/bin/utaipan-gh47qXpMRh/data/c68f2d516/c4383cb881224e06bf26c0cea35aa902 [2022-12-14 09:56:58,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:56:58,139 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:56:58,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:56:58,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:56:58,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:56:58,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:56:58" (1/1) ... [2022-12-14 09:56:58,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@677066de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:56:58, skipping insertion in model container [2022-12-14 09:56:58,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:56:58" (1/1) ... [2022-12-14 09:56:58,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:56:58,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:56:58,288 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_d36f3953-6213-4e47-b6c2-69073a7e5431/sv-benchmarks/c/array-cav19/array_tiling_tcpy.c[408,421] [2022-12-14 09:56:58,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:56:58,311 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:56:58,319 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_d36f3953-6213-4e47-b6c2-69073a7e5431/sv-benchmarks/c/array-cav19/array_tiling_tcpy.c[408,421] [2022-12-14 09:56:58,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:56:58,333 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:56:58,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:56:58 WrapperNode [2022-12-14 09:56:58,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:56:58,334 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:56:58,334 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:56:58,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:56:58,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:56:58" (1/1) ... [2022-12-14 09:56:58,345 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:56:58" (1/1) ... [2022-12-14 09:56:58,358 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 60 [2022-12-14 09:56:58,359 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:56:58,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:56:58,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:56:58,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:56:58,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:56:58" (1/1) ... [2022-12-14 09:56:58,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:56:58" (1/1) ... [2022-12-14 09:56:58,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:56:58" (1/1) ... [2022-12-14 09:56:58,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:56:58" (1/1) ... [2022-12-14 09:56:58,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:56:58" (1/1) ... [2022-12-14 09:56:58,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:56:58" (1/1) ... [2022-12-14 09:56:58,377 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:56:58" (1/1) ... [2022-12-14 09:56:58,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:56:58" (1/1) ... [2022-12-14 09:56:58,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:56:58,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:56:58,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:56:58,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:56:58,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:56:58" (1/1) ... [2022-12-14 09:56:58,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:56:58,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36f3953-6213-4e47-b6c2-69073a7e5431/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:56:58,405 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36f3953-6213-4e47-b6c2-69073a7e5431/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:56:58,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36f3953-6213-4e47-b6c2-69073a7e5431/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:56:58,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:56:58,440 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 09:56:58,440 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 09:56:58,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:56:58,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 09:56:58,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 09:56:58,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:56:58,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:56:58,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 09:56:58,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:56:58,503 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:56:58,505 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:56:58,622 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:56:58,659 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:56:58,659 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 09:56:58,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:56:58 BoogieIcfgContainer [2022-12-14 09:56:58,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:56:58,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:56:58,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:56:58,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:56:58,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:56:58" (1/3) ... [2022-12-14 09:56:58,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5549e37f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:56:58, skipping insertion in model container [2022-12-14 09:56:58,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:56:58" (2/3) ... [2022-12-14 09:56:58,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5549e37f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:56:58, skipping insertion in model container [2022-12-14 09:56:58,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:56:58" (3/3) ... [2022-12-14 09:56:58,670 INFO L112 eAbstractionObserver]: Analyzing ICFG array_tiling_tcpy.c [2022-12-14 09:56:58,689 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:56:58,689 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 09:56:58,739 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:56:58,746 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;@ce5ee4c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:56:58,746 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 09:56:58,750 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:56:58,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 09:56:58,758 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:56:58,759 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:56:58,759 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:56:58,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:56:58,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1517292925, now seen corresponding path program 1 times [2022-12-14 09:56:58,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:56:58,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746686997] [2022-12-14 09:56:58,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:56:58,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:56:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:56:59,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:56:59,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746686997] [2022-12-14 09:56:59,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746686997] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:56:59,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:56:59,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:56:59,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488617240] [2022-12-14 09:56:59,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:56:59,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:56:59,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:56:59,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:56:59,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:56:59,079 INFO L87 Difference]: Start difference. First operand has 13 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 09:56:59,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:56:59,129 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-12-14 09:56:59,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:56:59,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 12 [2022-12-14 09:56:59,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:56:59,136 INFO L225 Difference]: With dead ends: 27 [2022-12-14 09:56:59,136 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 09:56:59,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:56:59,141 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:56:59,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 18 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:56:59,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 09:56:59,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2022-12-14 09:56:59,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:56:59,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-12-14 09:56:59,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 12 [2022-12-14 09:56:59,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:56:59,176 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-12-14 09:56:59,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 09:56:59,176 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-12-14 09:56:59,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 09:56:59,177 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:56:59,177 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:56:59,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:56:59,177 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:56:59,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:56:59,178 INFO L85 PathProgramCache]: Analyzing trace with hash -213805710, now seen corresponding path program 1 times [2022-12-14 09:56:59,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:56:59,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904448726] [2022-12-14 09:56:59,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:56:59,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:56:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:56:59,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:56:59,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904448726] [2022-12-14 09:56:59,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904448726] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:56:59,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563483481] [2022-12-14 09:56:59,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:56:59,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:59,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36f3953-6213-4e47-b6c2-69073a7e5431/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:56:59,315 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36f3953-6213-4e47-b6c2-69073a7e5431/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:56:59,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36f3953-6213-4e47-b6c2-69073a7e5431/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:56:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:59,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 09:56:59,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:56:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:56:59,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:56:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:56:59,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563483481] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:56:59,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [944002433] [2022-12-14 09:56:59,579 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 09:56:59,579 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:56:59,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:56:59,588 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:56:59,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:56:59,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:59,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:59,844 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 09:56:59,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 09:56:59,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:59,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:59,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 09:56:59,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:59,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:59,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:59,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:59,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:59,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 73 [2022-12-14 09:57:00,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:57:00,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:57:00,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:57:00,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:57:00,105 INFO L321 Elim1Store]: treesize reduction 140, result has 19.5 percent of original size [2022-12-14 09:57:00,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 368 treesize of output 384 [2022-12-14 09:57:00,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:57:00,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:57:00,198 INFO L321 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2022-12-14 09:57:00,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2022-12-14 09:57:00,251 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2022-12-14 09:57:00,279 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:57:00,893 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '156#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~S~0#1| 2147483647) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#acopy~0#1.base|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (< |ULTIMATE.start_main_~i~0#1| (* 2 |ULTIMATE.start_main_~S~0#1|)) (<= 0 |ULTIMATE.start_main_~#acopy~0#1.offset|) (<= 0 |#NULL.offset|) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#acopy~0#1.base|) (+ |ULTIMATE.start_main_~#acopy~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= |ULTIMATE.start_main_~#acopy~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 09:57:00,893 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:57:00,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:57:00,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-12-14 09:57:00,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550032847] [2022-12-14 09:57:00,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:57:00,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 09:57:00,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:57:00,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 09:57:00,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-12-14 09:57:00,897 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:57:00,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:00,936 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-12-14 09:57:00,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:57:00,936 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2022-12-14 09:57:00,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:00,937 INFO L225 Difference]: With dead ends: 29 [2022-12-14 09:57:00,937 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 09:57:00,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-12-14 09:57:00,939 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:00,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 17 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:57:00,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 09:57:00,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2022-12-14 09:57:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:57:00,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-12-14 09:57:00,943 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 13 [2022-12-14 09:57:00,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:00,944 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-12-14 09:57:00,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:57:00,944 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-12-14 09:57:00,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 09:57:00,945 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:00,945 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:57:00,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36f3953-6213-4e47-b6c2-69073a7e5431/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:57:01,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36f3953-6213-4e47-b6c2-69073a7e5431/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 09:57:01,147 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:57:01,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:01,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1956711453, now seen corresponding path program 2 times [2022-12-14 09:57:01,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:57:01,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084972935] [2022-12-14 09:57:01,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:01,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:57:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:57:01,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:57:01,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084972935] [2022-12-14 09:57:01,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084972935] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:57:01,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507041997] [2022-12-14 09:57:01,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:57:01,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:57:01,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36f3953-6213-4e47-b6c2-69073a7e5431/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:57:01,607 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36f3953-6213-4e47-b6c2-69073a7e5431/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:57:01,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d36f3953-6213-4e47-b6c2-69073a7e5431/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:57:01,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 09:57:01,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:57:01,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-14 09:57:01,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:57:01,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 09:57:01,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:01,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:01,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 27 [2022-12-14 09:57:01,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:01,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:01,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:01,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 44 [2022-12-14 09:57:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:57:01,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:57:01,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:57:01,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7668 treesize of output 7328 [2022-12-14 09:57:01,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2462 treesize of output 2246