./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/conda.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/conda.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4382625030c70271d5cb32641146c4ec68928c0500a545b71e51fae395fc6041 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:28:55,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:28:55,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:28:55,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:28:55,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:28:55,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:28:55,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:28:55,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:28:55,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:28:55,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:28:55,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:28:55,697 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:28:55,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:28:55,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:28:55,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:28:55,708 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:28:55,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:28:55,712 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:28:55,714 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:28:55,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:28:55,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:28:55,721 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:28:55,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:28:55,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:28:55,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:28:55,732 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:28:55,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:28:55,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:28:55,736 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:28:55,737 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:28:55,738 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:28:55,739 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:28:55,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:28:55,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:28:55,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:28:55,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:28:55,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:28:55,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:28:55,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:28:55,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:28:55,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:28:55,747 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:28:55,787 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:28:55,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:28:55,788 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:28:55,788 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:28:55,789 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:28:55,789 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:28:55,789 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:28:55,790 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:28:55,790 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:28:55,790 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:28:55,791 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:28:55,791 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:28:55,792 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:28:55,792 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:28:55,792 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:28:55,792 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:28:55,793 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:28:55,793 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:28:55,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:28:55,794 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:28:55,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:28:55,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:28:55,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:28:55,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:28:55,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:28:55,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:28:55,795 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:28:55,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:28:55,796 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:28:55,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:28:55,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:28:55,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:28:55,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:28:55,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:28:55,798 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:28:55,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:28:55,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:28:55,798 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:28:55,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:28:55,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:28:55,799 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:28:55,799 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_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4382625030c70271d5cb32641146c4ec68928c0500a545b71e51fae395fc6041 [2022-11-03 02:28:56,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:28:56,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:28:56,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:28:56,131 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:28:56,131 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:28:56,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-fpi/conda.c [2022-11-03 02:28:56,204 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/data/46f02fa1e/740c4147024a48f2a128e42c76e56293/FLAG18f1fb59a [2022-11-03 02:28:56,759 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:28:56,760 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/sv-benchmarks/c/array-fpi/conda.c [2022-11-03 02:28:56,776 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/data/46f02fa1e/740c4147024a48f2a128e42c76e56293/FLAG18f1fb59a [2022-11-03 02:28:57,139 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/data/46f02fa1e/740c4147024a48f2a128e42c76e56293 [2022-11-03 02:28:57,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:28:57,145 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:28:57,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:28:57,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:28:57,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:28:57,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:28:57" (1/1) ... [2022-11-03 02:28:57,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a43bf73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:57, skipping insertion in model container [2022-11-03 02:28:57,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:28:57" (1/1) ... [2022-11-03 02:28:57,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:28:57,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:28:57,342 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/sv-benchmarks/c/array-fpi/conda.c[588,601] [2022-11-03 02:28:57,384 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:28:57,391 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:28:57,402 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/sv-benchmarks/c/array-fpi/conda.c[588,601] [2022-11-03 02:28:57,410 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:28:57,422 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:28:57,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:57 WrapperNode [2022-11-03 02:28:57,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:28:57,424 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:28:57,424 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:28:57,424 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:28:57,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:57" (1/1) ... [2022-11-03 02:28:57,438 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:57" (1/1) ... [2022-11-03 02:28:57,458 INFO L138 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2022-11-03 02:28:57,458 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:28:57,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:28:57,459 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:28:57,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:28:57,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:57" (1/1) ... [2022-11-03 02:28:57,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:57" (1/1) ... [2022-11-03 02:28:57,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:57" (1/1) ... [2022-11-03 02:28:57,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:57" (1/1) ... [2022-11-03 02:28:57,478 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:57" (1/1) ... [2022-11-03 02:28:57,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:57" (1/1) ... [2022-11-03 02:28:57,484 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:57" (1/1) ... [2022-11-03 02:28:57,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:57" (1/1) ... [2022-11-03 02:28:57,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:28:57,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:28:57,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:28:57,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:28:57,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:57" (1/1) ... [2022-11-03 02:28:57,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:28:57,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:57,521 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:28:57,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:28:57,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:28:57,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:28:57,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:28:57,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:28:57,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:28:57,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:28:57,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:28:57,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:28:57,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:28:57,635 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:28:57,637 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:28:57,966 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:28:58,051 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:28:58,052 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 02:28:58,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:28:58 BoogieIcfgContainer [2022-11-03 02:28:58,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:28:58,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:28:58,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:28:58,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:28:58,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:28:57" (1/3) ... [2022-11-03 02:28:58,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c07de96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:28:58, skipping insertion in model container [2022-11-03 02:28:58,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:57" (2/3) ... [2022-11-03 02:28:58,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c07de96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:28:58, skipping insertion in model container [2022-11-03 02:28:58,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:28:58" (3/3) ... [2022-11-03 02:28:58,065 INFO L112 eAbstractionObserver]: Analyzing ICFG conda.c [2022-11-03 02:28:58,085 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:28:58,085 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:28:58,132 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:28:58,144 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;@95ded25, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:28:58,144 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:28:58,151 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:58,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 02:28:58,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:58,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:58,160 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:58,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:58,166 INFO L85 PathProgramCache]: Analyzing trace with hash -535561234, now seen corresponding path program 1 times [2022-11-03 02:28:58,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:58,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503682710] [2022-11-03 02:28:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:58,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:58,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:58,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503682710] [2022-11-03 02:28:58,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503682710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:58,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:28:58,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:28:58,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818035487] [2022-11-03 02:28:58,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:58,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:28:58,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:58,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:28:58,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:28:58,642 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:58,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:58,734 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2022-11-03 02:28:58,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:28:58,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-03 02:28:58,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:58,745 INFO L225 Difference]: With dead ends: 20 [2022-11-03 02:28:58,745 INFO L226 Difference]: Without dead ends: 9 [2022-11-03 02:28:58,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:28:58,755 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:58,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:28:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-03 02:28:58,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-03 02:28:58,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:58,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-11-03 02:28:58,798 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2022-11-03 02:28:58,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:58,798 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-11-03 02:28:58,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:58,799 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-11-03 02:28:58,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 02:28:58,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:58,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:58,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:28:58,801 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:58,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:58,802 INFO L85 PathProgramCache]: Analyzing trace with hash 344823405, now seen corresponding path program 1 times [2022-11-03 02:28:58,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:58,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746589361] [2022-11-03 02:28:58,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:58,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:28:58,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:58,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746589361] [2022-11-03 02:28:58,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746589361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:58,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:28:58,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:28:58,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194899634] [2022-11-03 02:28:58,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:58,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:28:58,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:58,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:28:58,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:28:58,923 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:58,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:58,956 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2022-11-03 02:28:58,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:28:58,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 [2022-11-03 02:28:58,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:58,957 INFO L225 Difference]: With dead ends: 15 [2022-11-03 02:28:58,957 INFO L226 Difference]: Without dead ends: 11 [2022-11-03 02:28:58,958 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 [2022-11-03 02:28:58,960 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:58,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 4 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:28:58,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-03 02:28:58,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-03 02:28:58,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:58,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-03 02:28:58,966 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2022-11-03 02:28:58,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:58,966 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-03 02:28:58,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:58,967 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-03 02:28:58,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 02:28:58,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:58,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:58,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:28:58,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:58,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:58,969 INFO L85 PathProgramCache]: Analyzing trace with hash 750922709, now seen corresponding path program 1 times [2022-11-03 02:28:58,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:58,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316656173] [2022-11-03 02:28:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:58,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:29:00,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:29:00,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316656173] [2022-11-03 02:29:00,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316656173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:29:00,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570704965] [2022-11-03 02:29:00,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:00,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:00,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:00,301 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:00,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:29:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:00,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:29:00,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:00,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:29:00,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:00,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 02:29:00,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:00,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 32 treesize of output 23 [2022-11-03 02:29:00,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:00,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-03 02:29:01,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 27 [2022-11-03 02:29:01,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:29:01,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:29:01,260 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse5 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse6 (select .cse4 .cse5))) (let ((.cse2 (* c_~N~0 2)) (.cse0 (= .cse6 1))) (and (or (not .cse0) (let ((.cse1 (let ((.cse3 (store .cse4 .cse5 (+ .cse6 1)))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (and (<= .cse1 .cse2) (<= .cse2 .cse1)))) (or (and (forall ((v_ArrVal_51 (Array Int Int))) (<= .cse2 (+ (select v_ArrVal_51 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_51) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (forall ((v_ArrVal_51 (Array Int Int))) (<= (+ (select v_ArrVal_51 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_51) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) .cse2))) .cse0))))) is different from false [2022-11-03 02:29:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-03 02:29:01,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570704965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:29:01,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [637975183] [2022-11-03 02:29:01,537 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:29:01,537 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:29:01,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:29:01,547 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:29:01,548 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:29:01,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,705 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 02:29:01,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 02:29:01,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 39 [2022-11-03 02:29:01,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:29:01,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:01,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 02:29:02,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:02,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:02,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:02,092 INFO L356 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2022-11-03 02:29:02,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 331 treesize of output 333 [2022-11-03 02:29:02,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:29:02,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-03 02:29:02,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 02:29:02,371 INFO L356 Elim1Store]: treesize reduction 32, result has 53.6 percent of original size [2022-11-03 02:29:02,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 135 [2022-11-03 02:29:02,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 161 [2022-11-03 02:29:02,465 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:29:02,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 161 treesize of output 158 [2022-11-03 02:29:02,565 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-03 02:29:02,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 171 treesize of output 141 [2022-11-03 02:29:02,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2022-11-03 02:29:02,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2022-11-03 02:29:02,697 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 02:29:02,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 02:29:02,785 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:29:02,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:29:02,829 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:29:03,364 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '176#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (ite (= (* 2 ~N~0) |ULTIMATE.start_main_#t~mem14#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 02:29:03,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:29:03,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:29:03,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-03 02:29:03,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122996759] [2022-11-03 02:29:03,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:29:03,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 02:29:03,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:29:03,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 02:29:03,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=469, Unknown=1, NotChecked=44, Total=600 [2022-11-03 02:29:03,367 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:03,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:03,681 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2022-11-03 02:29:03,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:29:03,682 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 02:29:03,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:03,684 INFO L225 Difference]: With dead ends: 21 [2022-11-03 02:29:03,684 INFO L226 Difference]: Without dead ends: 18 [2022-11-03 02:29:03,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=508, Unknown=1, NotChecked=46, Total=650 [2022-11-03 02:29:03,686 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:03,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 111 Invalid, 0 Unknown, 15 Unchecked, 0.2s Time] [2022-11-03 02:29:03,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-03 02:29:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2022-11-03 02:29:03,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) [2022-11-03 02:29:03,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-11-03 02:29:03,694 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 10 [2022-11-03 02:29:03,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:03,694 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-11-03 02:29:03,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:03,695 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-11-03 02:29:03,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:29:03,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:03,696 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:03,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:03,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:03,921 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:03,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:03,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1803519565, now seen corresponding path program 2 times [2022-11-03 02:29:03,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:29:03,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651863932] [2022-11-03 02:29:03,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:03,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:29:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:29:04,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:29:04,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651863932] [2022-11-03 02:29:04,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651863932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:29:04,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646319158] [2022-11-03 02:29:04,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:29:04,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:04,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:04,059 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:04,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:29:04,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:29:04,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:29:04,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:29:04,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:29:04,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:29:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:29:04,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646319158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:29:04,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [57943593] [2022-11-03 02:29:04,238 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:29:04,239 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:29:04,239 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:29:04,239 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:29:04,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:29:04,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:04,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2022-11-03 02:29:04,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:04,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:04,393 INFO L356 Elim1Store]: treesize reduction 71, result has 30.4 percent of original size [2022-11-03 02:29:04,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 54 [2022-11-03 02:29:04,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:04,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:04,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:04,493 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 02:29:04,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 02:29:04,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:04,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:04,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 02:29:04,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:04,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:04,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:04,704 INFO L356 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2022-11-03 02:29:04,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 331 treesize of output 333 [2022-11-03 02:29:04,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:29:04,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2022-11-03 02:29:04,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2022-11-03 02:29:04,908 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:29:04,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 120 [2022-11-03 02:29:04,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 52 [2022-11-03 02:29:04,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 31 [2022-11-03 02:29:04,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 64 [2022-11-03 02:29:05,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2022-11-03 02:29:05,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2022-11-03 02:29:05,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:05,073 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:29:05,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:29:05,153 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:29:05,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:29:05,200 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:29:05,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '313#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (ite (= (* 2 ~N~0) |ULTIMATE.start_main_#t~mem14#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 02:29:05,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:29:05,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:29:05,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-03 02:29:05,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243076411] [2022-11-03 02:29:05,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:29:05,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:29:05,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:29:05,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:29:05,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:29:05,656 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:05,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:05,767 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-11-03 02:29:05,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:29:05,767 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 02:29:05,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:05,768 INFO L225 Difference]: With dead ends: 32 [2022-11-03 02:29:05,768 INFO L226 Difference]: Without dead ends: 22 [2022-11-03 02:29:05,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:29:05,769 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:05,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 12 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:29:05,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-03 02:29:05,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2022-11-03 02:29:05,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:05,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-03 02:29:05,777 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2022-11-03 02:29:05,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:05,777 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-03 02:29:05,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:05,777 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-03 02:29:05,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:29:05,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:05,778 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:05,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:05,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:05,979 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:05,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:05,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1075573514, now seen corresponding path program 3 times [2022-11-03 02:29:05,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:29:05,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438027086] [2022-11-03 02:29:05,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:05,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:29:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:29:06,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:29:06,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438027086] [2022-11-03 02:29:06,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438027086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:29:06,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164380533] [2022-11-03 02:29:06,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:29:06,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:06,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:06,092 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:06,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:29:06,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:29:06,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:29:06,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:29:06,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:29:06,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:29:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:29:06,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164380533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:29:06,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [253370946] [2022-11-03 02:29:06,257 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:29:06,257 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:29:06,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:29:06,258 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:29:06,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:29:06,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:06,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:06,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:06,360 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 02:29:06,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 02:29:06,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:06,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:06,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 39 [2022-11-03 02:29:06,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:06,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:29:06,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:06,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:06,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 02:29:06,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:06,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:06,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:06,609 INFO L356 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2022-11-03 02:29:06,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 331 treesize of output 333 [2022-11-03 02:29:06,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:29:06,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2022-11-03 02:29:06,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2022-11-03 02:29:06,775 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:29:06,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 120 [2022-11-03 02:29:06,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2022-11-03 02:29:06,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 27 [2022-11-03 02:29:06,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 67 [2022-11-03 02:29:06,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2022-11-03 02:29:06,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2022-11-03 02:29:06,898 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 02:29:06,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 02:29:06,976 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:29:06,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:29:07,009 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:29:07,383 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '467#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (ite (= (* 2 ~N~0) |ULTIMATE.start_main_#t~mem14#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 02:29:07,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:29:07,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:29:07,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-03 02:29:07,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905051072] [2022-11-03 02:29:07,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:29:07,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:29:07,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:29:07,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:29:07,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:29:07,385 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:07,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:07,504 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-11-03 02:29:07,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:29:07,505 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 02:29:07,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:07,505 INFO L225 Difference]: With dead ends: 19 [2022-11-03 02:29:07,505 INFO L226 Difference]: Without dead ends: 14 [2022-11-03 02:29:07,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:29:07,507 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:07,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:29:07,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-03 02:29:07,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-03 02:29:07,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:07,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-03 02:29:07,514 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2022-11-03 02:29:07,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:07,514 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-03 02:29:07,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:07,514 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-03 02:29:07,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:29:07,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:07,515 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:07,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:07,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:07,715 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:07,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:07,716 INFO L85 PathProgramCache]: Analyzing trace with hash 135501902, now seen corresponding path program 4 times [2022-11-03 02:29:07,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:29:07,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811260483] [2022-11-03 02:29:07,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:07,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:29:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:29:09,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:29:09,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811260483] [2022-11-03 02:29:09,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811260483] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:29:09,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377390413] [2022-11-03 02:29:09,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:29:09,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:09,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:09,160 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:09,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:29:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:09,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:29:09,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:09,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 02:29:09,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2022-11-03 02:29:09,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 02:29:09,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:09,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-03 02:29:09,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 101 [2022-11-03 02:29:09,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:09,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:09,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 54 [2022-11-03 02:29:09,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-03 02:29:09,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 89 [2022-11-03 02:29:09,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:09,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:09,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-11-03 02:29:09,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2022-11-03 02:29:09,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:09,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-11-03 02:29:09,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:09,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:09,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-11-03 02:29:09,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:09,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 32 [2022-11-03 02:29:10,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:29:10,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:29:10,252 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse17 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse18 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse19 (select .cse17 .cse18))) (let ((.cse6 (* c_~N~0 2)) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse0 (= .cse19 1))) (and (or .cse0 (and (forall ((v_ArrVal_182 (Array Int Int))) (<= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_182))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select v_ArrVal_182 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) .cse4)))) .cse6)) (forall ((v_ArrVal_182 (Array Int Int))) (<= .cse6 (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_182))) (let ((.cse9 (select .cse8 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse7 (select v_ArrVal_182 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse10 (select .cse9 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse7 (select (select (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse7 .cse10))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) .cse10)))))))) (or (let ((.cse11 (let ((.cse16 (store .cse17 .cse18 (+ .cse19 1)))) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse16))) (let ((.cse14 (select .cse13 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse12 (select .cse14 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse15 (select .cse16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse12 (select (select (store .cse13 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse14 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse12 .cse15))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) .cse15))))))) (and (<= .cse11 .cse6) (<= .cse6 .cse11))) (not .cse0)))))) is different from false [2022-11-03 02:29:10,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:29:10,422 INFO L356 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2022-11-03 02:29:10,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 537 treesize of output 262 [2022-11-03 02:29:35,994 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-11-03 02:29:35,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-11-03 02:29:35,999 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2022-11-03 02:29:36,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1762364494] [2022-11-03 02:29:36,002 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:29:36,002 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:29:36,003 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:29:36,003 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:29:36,003 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:29:36,007 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:274) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:221) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 44 more [2022-11-03 02:29:36,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:29:36,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-11-03 02:29:36,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589853501] [2022-11-03 02:29:36,011 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:29:36,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:29:36,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:29:36,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:29:36,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=433, Unknown=1, NotChecked=42, Total=552 [2022-11-03 02:29:36,013 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:36,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=433, Unknown=1, NotChecked=42, Total=552 [2022-11-03 02:29:36,015 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:36,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:29:36,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:36,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:36,217 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertCodeBlock(IncrementalHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:278) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:199) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:365) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 36 more [2022-11-03 02:29:36,219 INFO L158 Benchmark]: Toolchain (without parser) took 39075.98ms. Allocated memory was 102.8MB in the beginning and 180.4MB in the end (delta: 77.6MB). Free memory was 62.6MB in the beginning and 123.8MB in the end (delta: -61.2MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. [2022-11-03 02:29:36,219 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 102.8MB. Free memory is still 78.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:29:36,219 INFO L158 Benchmark]: CACSL2BoogieTranslator took 272.76ms. Allocated memory is still 102.8MB. Free memory was 62.3MB in the beginning and 77.7MB in the end (delta: -15.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:29:36,219 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.70ms. Allocated memory is still 102.8MB. Free memory was 77.3MB in the beginning and 76.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:29:36,220 INFO L158 Benchmark]: Boogie Preprocessor took 28.11ms. Allocated memory is still 102.8MB. Free memory was 75.6MB in the beginning and 74.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:29:36,220 INFO L158 Benchmark]: RCFGBuilder took 567.08ms. Allocated memory is still 102.8MB. Free memory was 74.3MB in the beginning and 58.8MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 02:29:36,220 INFO L158 Benchmark]: TraceAbstraction took 38161.70ms. Allocated memory was 102.8MB in the beginning and 180.4MB in the end (delta: 77.6MB). Free memory was 58.4MB in the beginning and 123.8MB in the end (delta: -65.4MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. [2022-11-03 02:29:36,222 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 102.8MB. Free memory is still 78.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 272.76ms. Allocated memory is still 102.8MB. Free memory was 62.3MB in the beginning and 77.7MB in the end (delta: -15.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.70ms. Allocated memory is still 102.8MB. Free memory was 77.3MB in the beginning and 76.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 28.11ms. Allocated memory is still 102.8MB. Free memory was 75.6MB in the beginning and 74.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 567.08ms. Allocated memory is still 102.8MB. Free memory was 74.3MB in the beginning and 58.8MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 38161.70ms. Allocated memory was 102.8MB in the beginning and 180.4MB in the end (delta: 77.6MB). Free memory was 58.4MB in the beginning and 123.8MB in the end (delta: -65.4MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/conda.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4382625030c70271d5cb32641146c4ec68928c0500a545b71e51fae395fc6041 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:29:38,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:29:38,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:29:38,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:29:38,670 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:29:38,671 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:29:38,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:29:38,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:29:38,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:29:38,678 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:29:38,679 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:29:38,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:29:38,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:29:38,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:29:38,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:29:38,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:29:38,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:29:38,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:29:38,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:29:38,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:29:38,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:29:38,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:29:38,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:29:38,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:29:38,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:29:38,730 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:29:38,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:29:38,731 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:29:38,732 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:29:38,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:29:38,734 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:29:38,734 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:29:38,735 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:29:38,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:29:38,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:29:38,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:29:38,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:29:38,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:29:38,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:29:38,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:29:38,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:29:38,742 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:29:38,771 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:29:38,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:29:38,774 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:29:38,774 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:29:38,775 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:29:38,775 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:29:38,775 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:29:38,775 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:29:38,776 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:29:38,776 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:29:38,776 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:29:38,776 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:29:38,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:29:38,778 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:29:38,778 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:29:38,778 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:29:38,778 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:29:38,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:29:38,779 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:29:38,779 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:29:38,779 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:29:38,779 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:29:38,780 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:29:38,780 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:29:38,780 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:29:38,780 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:29:38,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:29:38,781 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:29:38,781 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:29:38,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:29:38,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:29:38,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:29:38,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:29:38,782 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:29:38,783 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:29:38,783 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:29:38,783 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:29:38,783 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:29:38,784 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4382625030c70271d5cb32641146c4ec68928c0500a545b71e51fae395fc6041 [2022-11-03 02:29:39,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:29:39,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:29:39,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:29:39,266 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:29:39,267 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:29:39,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-fpi/conda.c [2022-11-03 02:29:39,340 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/data/9d94875a3/267f4a8688ce4ad58011ba86be8565b5/FLAGcf071987e [2022-11-03 02:29:39,885 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:29:39,886 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/sv-benchmarks/c/array-fpi/conda.c [2022-11-03 02:29:39,895 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/data/9d94875a3/267f4a8688ce4ad58011ba86be8565b5/FLAGcf071987e [2022-11-03 02:29:40,234 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/data/9d94875a3/267f4a8688ce4ad58011ba86be8565b5 [2022-11-03 02:29:40,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:29:40,238 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:29:40,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:29:40,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:29:40,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:29:40,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5490fd4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40, skipping insertion in model container [2022-11-03 02:29:40,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:29:40,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:29:40,451 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/sv-benchmarks/c/array-fpi/conda.c[588,601] [2022-11-03 02:29:40,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:29:40,489 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:29:40,530 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/sv-benchmarks/c/array-fpi/conda.c[588,601] [2022-11-03 02:29:40,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:29:40,573 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:29:40,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40 WrapperNode [2022-11-03 02:29:40,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:29:40,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:29:40,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:29:40,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:29:40,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,611 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2022-11-03 02:29:40,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:29:40,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:29:40,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:29:40,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:29:40,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,641 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:29:40,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:29:40,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:29:40,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:29:40,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (1/1) ... [2022-11-03 02:29:40,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:29:40,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:40,681 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:29:40,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:29:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:29:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:29:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:29:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-11-03 02:29:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:29:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 02:29:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:29:40,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:29:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-11-03 02:29:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:29:40,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 02:29:40,803 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:29:40,806 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:29:41,083 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:29:41,118 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:29:41,118 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 02:29:41,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:29:41 BoogieIcfgContainer [2022-11-03 02:29:41,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:29:41,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:29:41,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:29:41,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:29:41,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:29:40" (1/3) ... [2022-11-03 02:29:41,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb8672c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:29:41, skipping insertion in model container [2022-11-03 02:29:41,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:40" (2/3) ... [2022-11-03 02:29:41,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb8672c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:29:41, skipping insertion in model container [2022-11-03 02:29:41,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:29:41" (3/3) ... [2022-11-03 02:29:41,132 INFO L112 eAbstractionObserver]: Analyzing ICFG conda.c [2022-11-03 02:29:41,183 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:29:41,194 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:29:41,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:29:41,295 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;@1053e3da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:29:41,296 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:29:41,302 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:41,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:29:41,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:41,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:41,314 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:41,330 INFO L85 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2022-11-03 02:29:41,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:29:41,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628387414] [2022-11-03 02:29:41,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:41,349 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:29:41,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:29:41,356 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:29:41,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:29:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:41,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:29:41,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:29:41,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:29:41,579 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:29:41,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628387414] [2022-11-03 02:29:41,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628387414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:29:41,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:29:41,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:29:41,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403678597] [2022-11-03 02:29:41,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:29:41,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:29:41,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:29:41,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:29:41,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:29:41,644 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:41,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:41,663 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-11-03 02:29:41,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:29:41,666 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 02:29:41,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:41,674 INFO L225 Difference]: With dead ends: 40 [2022-11-03 02:29:41,674 INFO L226 Difference]: Without dead ends: 18 [2022-11-03 02:29:41,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:29:41,682 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:41,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:29:41,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-03 02:29:41,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-03 02:29:41,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:41,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-03 02:29:41,747 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2022-11-03 02:29:41,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:41,748 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-03 02:29:41,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:41,748 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-03 02:29:41,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:29:41,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:41,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:41,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:41,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:29:41,961 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:41,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:41,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2022-11-03 02:29:41,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:29:41,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529956086] [2022-11-03 02:29:41,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:41,964 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:29:41,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:29:41,965 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:29:41,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:29:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:42,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:29:42,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:29:42,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:29:42,210 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:29:42,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529956086] [2022-11-03 02:29:42,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529956086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:29:42,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:29:42,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:29:42,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102185620] [2022-11-03 02:29:42,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:29:42,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:29:42,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:29:42,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:29:42,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:29:42,215 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:42,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:42,447 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-11-03 02:29:42,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:29:42,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 02:29:42,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:42,449 INFO L225 Difference]: With dead ends: 36 [2022-11-03 02:29:42,449 INFO L226 Difference]: Without dead ends: 25 [2022-11-03 02:29:42,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:29:42,451 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:42,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 9 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:29:42,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-03 02:29:42,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2022-11-03 02:29:42,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:42,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-03 02:29:42,461 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2022-11-03 02:29:42,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:42,461 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-03 02:29:42,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:42,462 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-03 02:29:42,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 02:29:42,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:42,463 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:42,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:42,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:29:42,677 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:42,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:42,679 INFO L85 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2022-11-03 02:29:42,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:29:42,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555007965] [2022-11-03 02:29:42,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:42,681 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:29:42,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:29:42,685 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:29:42,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:29:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:42,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:29:42,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:43,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:43,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:29:43,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 02:29:43,247 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:29:43,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 34 treesize of output 36 [2022-11-03 02:29:43,751 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:29:43,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2022-11-03 02:29:44,104 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:29:44,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 47 [2022-11-03 02:29:44,417 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:29:44,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 52 [2022-11-03 02:29:44,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:29:44,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:29:51,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:29:51,378 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:29:51,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555007965] [2022-11-03 02:29:51,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555007965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:29:51,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [331383964] [2022-11-03 02:29:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:51,379 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:29:51,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:29:51,404 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:29:51,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-03 02:29:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:51,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:29:51,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:51,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:51,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:51,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 19 [2022-11-03 02:29:52,005 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:29:52,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-11-03 02:29:52,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:52,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-11-03 02:29:53,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:53,244 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-03 02:29:53,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 37 [2022-11-03 02:29:53,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:53,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:53,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 47 [2022-11-03 02:29:54,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:54,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 52 [2022-11-03 02:29:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:29:54,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:00,897 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:00,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 69 [2022-11-03 02:30:03,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:03,397 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:03,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 71 [2022-11-03 02:30:03,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:03,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2022-11-03 02:30:03,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-11-03 02:30:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:03,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [331383964] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:03,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647030027] [2022-11-03 02:30:03,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:03,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:03,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:03,468 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:03,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:30:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:03,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:30:03,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:03,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:03,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:30:03,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 02:30:03,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:30:04,852 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:04,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2022-11-03 02:30:05,385 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:05,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 47 [2022-11-03 02:30:05,800 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:05,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 52 [2022-11-03 02:30:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:05,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:06,113 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:06,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 69 [2022-11-03 02:30:08,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:08,609 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:08,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 116 treesize of output 77 [2022-11-03 02:30:08,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:08,623 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:08,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 35 [2022-11-03 02:30:08,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-11-03 02:30:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:08,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647030027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:08,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:30:08,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12, 13, 13, 14] total 47 [2022-11-03 02:30:08,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684637845] [2022-11-03 02:30:08,666 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:08,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-03 02:30:08,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:08,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-03 02:30:08,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1763, Unknown=6, NotChecked=0, Total=2162 [2022-11-03 02:30:08,671 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:11,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:11,040 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2022-11-03 02:30:11,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:30:11,041 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-03 02:30:11,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:11,049 INFO L225 Difference]: With dead ends: 45 [2022-11-03 02:30:11,050 INFO L226 Difference]: Without dead ends: 39 [2022-11-03 02:30:11,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=527, Invalid=2437, Unknown=6, NotChecked=0, Total=2970 [2022-11-03 02:30:11,055 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:11,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 82 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 80 Unchecked, 0.6s Time] [2022-11-03 02:30:11,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-03 02:30:11,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2022-11-03 02:30:11,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:11,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-11-03 02:30:11,074 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 20 [2022-11-03 02:30:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:11,075 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-11-03 02:30:11,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-11-03 02:30:11,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 02:30:11,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:11,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:11,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-11-03 02:30:11,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:11,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:11,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:11,680 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:11,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:11,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1608161903, now seen corresponding path program 1 times [2022-11-03 02:30:11,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:11,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934644949] [2022-11-03 02:30:11,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:11,682 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:11,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:11,686 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:11,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:30:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:11,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:30:11,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:11,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:30:11,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:30:11,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:11,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:11,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-03 02:30:11,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 02:30:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:11,956 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:11,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934644949] [2022-11-03 02:30:11,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934644949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:11,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1676879795] [2022-11-03 02:30:11,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:11,956 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:11,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:30:11,957 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:30:11,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-03 02:30:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:12,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:30:12,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:12,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:30:12,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:30:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:12,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:12,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-03 02:30:12,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 02:30:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:12,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1676879795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:12,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118916846] [2022-11-03 02:30:12,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:12,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:12,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:12,294 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:12,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:30:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:12,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:30:12,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:12,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:30:12,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:30:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:12,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:12,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-03 02:30:12,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 02:30:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:12,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118916846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:12,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:30:12,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2022-11-03 02:30:12,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080338758] [2022-11-03 02:30:12,480 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:12,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:30:12,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:12,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:30:12,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:30:12,482 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2022-11-03 02:30:12,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:12,779 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2022-11-03 02:30:12,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:30:12,780 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) Word has length 20 [2022-11-03 02:30:12,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:12,781 INFO L225 Difference]: With dead ends: 49 [2022-11-03 02:30:12,781 INFO L226 Difference]: Without dead ends: 38 [2022-11-03 02:30:12,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:30:12,783 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:12,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 53 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:30:12,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-03 02:30:12,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2022-11-03 02:30:12,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:12,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-11-03 02:30:12,795 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 20 [2022-11-03 02:30:12,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:12,795 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-11-03 02:30:12,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2022-11-03 02:30:12,796 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-11-03 02:30:12,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:30:12,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:12,797 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:12,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:13,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:13,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2022-11-03 02:30:13,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:13,436 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:13,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:13,437 INFO L85 PathProgramCache]: Analyzing trace with hash -949569453, now seen corresponding path program 2 times [2022-11-03 02:30:13,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:13,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790578513] [2022-11-03 02:30:13,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:30:13,438 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:13,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:13,439 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:13,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:30:13,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:30:13,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:13,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:30:13,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:13,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:14,032 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:14,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790578513] [2022-11-03 02:30:14,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790578513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:14,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2001499391] [2022-11-03 02:30:14,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:30:14,033 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:14,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:30:14,034 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:30:14,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 02:30:14,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:30:14,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:14,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:30:14,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:14,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:14,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2001499391] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:14,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713413690] [2022-11-03 02:30:14,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:30:14,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:14,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:14,351 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:14,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:30:14,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:30:14,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:14,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:30:14,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:14,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:14,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713413690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:14,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:30:14,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9, 7, 8, 7] total 17 [2022-11-03 02:30:14,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100600452] [2022-11-03 02:30:14,703 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:14,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:30:14,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:14,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:30:14,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:30:14,705 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:15,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:15,474 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2022-11-03 02:30:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:30:15,475 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-03 02:30:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:15,476 INFO L225 Difference]: With dead ends: 66 [2022-11-03 02:30:15,476 INFO L226 Difference]: Without dead ends: 40 [2022-11-03 02:30:15,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:30:15,477 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 120 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:15,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 19 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:30:15,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-03 02:30:15,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2022-11-03 02:30:15,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:15,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-11-03 02:30:15,490 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2022-11-03 02:30:15,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:15,491 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-11-03 02:30:15,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:15,491 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-11-03 02:30:15,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:30:15,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:15,492 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:15,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:15,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:15,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:16,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:16,112 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:16,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:16,113 INFO L85 PathProgramCache]: Analyzing trace with hash -2105967953, now seen corresponding path program 3 times [2022-11-03 02:30:16,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:16,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519985933] [2022-11-03 02:30:16,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:30:16,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:16,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:16,115 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:16,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:30:16,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:30:16,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:16,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:30:16,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:16,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:16,964 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:16,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519985933] [2022-11-03 02:30:16,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519985933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:16,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [96119693] [2022-11-03 02:30:16,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:30:16,965 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:16,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:30:16,966 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:30:16,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-03 02:30:17,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:30:17,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:17,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:30:17,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:17,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:17,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [96119693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:17,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239463801] [2022-11-03 02:30:17,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:30:17,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:17,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:17,584 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:17,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:30:17,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:30:17,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:17,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:30:17,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:17,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:17,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:17,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239463801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:17,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:30:17,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9, 7, 8, 7] total 27 [2022-11-03 02:30:17,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055675408] [2022-11-03 02:30:17,987 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:17,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 02:30:17,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:17,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 02:30:17,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:30:17,989 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:19,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:19,309 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2022-11-03 02:30:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:30:19,312 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-03 02:30:19,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:19,313 INFO L225 Difference]: With dead ends: 72 [2022-11-03 02:30:19,313 INFO L226 Difference]: Without dead ends: 57 [2022-11-03 02:30:19,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=410, Invalid=1072, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:30:19,314 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 217 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:19,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 25 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:30:19,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-03 02:30:19,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2022-11-03 02:30:19,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 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) [2022-11-03 02:30:19,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-11-03 02:30:19,326 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 22 [2022-11-03 02:30:19,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:19,326 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-11-03 02:30:19,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:19,327 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-11-03 02:30:19,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 02:30:19,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:19,328 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:19,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:19,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:19,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:19,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:19,929 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:19,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:19,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1032594067, now seen corresponding path program 4 times [2022-11-03 02:30:19,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:19,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761584955] [2022-11-03 02:30:19,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:30:19,930 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:19,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:19,931 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:19,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:30:20,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:30:20,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:20,093 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 02:30:20,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:20,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 02:30:20,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:20,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 19 [2022-11-03 02:30:20,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:30:20,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:30:20,907 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:20,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-11-03 02:30:21,339 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:21,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 49 [2022-11-03 02:30:21,764 INFO L356 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-03 02:30:21,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 99 treesize of output 70 [2022-11-03 02:30:22,592 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:22,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 117 treesize of output 73 [2022-11-03 02:30:22,866 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:22,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 135 treesize of output 83 [2022-11-03 02:30:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:22,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:05,890 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:31:05,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 653 treesize of output 289 [2022-11-03 02:31:14,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:14,699 INFO L356 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-03 02:31:14,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 1 [2022-11-03 02:31:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:14,703 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:14,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761584955] [2022-11-03 02:31:14,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761584955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:14,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1445048914] [2022-11-03 02:31:14,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:31:14,704 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:14,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:31:14,716 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:31:14,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-03 02:31:14,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:31:14,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:31:14,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:31:14,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:15,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:15,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:15,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 19 [2022-11-03 02:31:15,822 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:31:15,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-11-03 02:31:15,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:15,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-11-03 02:31:16,750 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:31:16,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-11-03 02:31:16,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:16,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-11-03 02:31:19,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:19,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:19,091 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-03 02:31:19,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 39 [2022-11-03 02:31:20,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:20,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:20,364 INFO L356 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2022-11-03 02:31:20,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 54 treesize of output 47 [2022-11-03 02:31:21,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:21,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:21,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:21,400 INFO L356 Elim1Store]: treesize reduction 107, result has 15.7 percent of original size [2022-11-03 02:31:21,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 97 treesize of output 60 [2022-11-03 02:31:22,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:22,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:22,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2022-11-03 02:31:23,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:23,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 75 [2022-11-03 02:31:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:23,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:56,231 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:31:56,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 653 treesize of output 289 [2022-11-03 02:32:09,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:09,082 INFO L356 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-11-03 02:32:09,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 482 treesize of output 1 [2022-11-03 02:32:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:32:09,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1445048914] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:09,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101107460] [2022-11-03 02:32:09,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:32:09,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:09,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:09,092 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:32:09,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 02:32:09,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:32:09,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:32:09,187 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 02:32:09,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:09,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:09,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:09,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 19 [2022-11-03 02:32:09,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 02:32:09,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:32:10,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:32:13,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:13,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 41 [2022-11-03 02:32:14,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:14,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:14,789 INFO L356 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2022-11-03 02:32:14,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 49 [2022-11-03 02:32:15,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:15,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:15,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:16,050 INFO L356 Elim1Store]: treesize reduction 107, result has 15.7 percent of original size [2022-11-03 02:32:16,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 99 treesize of output 62 [2022-11-03 02:32:17,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:17,329 INFO L356 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2022-11-03 02:32:17,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 103 treesize of output 71 [2022-11-03 02:32:18,395 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-03 02:32:18,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 123 treesize of output 87 [2022-11-03 02:32:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:32:18,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:19,688 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:32:19,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 653 treesize of output 289 [2022-11-03 02:32:28,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:28,440 INFO L356 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-11-03 02:32:28,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 482 treesize of output 1 [2022-11-03 02:32:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:32:28,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101107460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:28,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:32:28,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 19, 18, 20, 18] total 73 [2022-11-03 02:32:28,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725919883] [2022-11-03 02:32:28,445 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:32:28,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-03 02:32:28,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:32:28,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-03 02:32:28,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=829, Invalid=4396, Unknown=31, NotChecked=0, Total=5256 [2022-11-03 02:32:28,450 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 73 states, 73 states have (on average 1.4109589041095891) internal successors, (103), 73 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:32:32,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:32,224 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-11-03 02:32:32,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:32:32,225 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.4109589041095891) internal successors, (103), 73 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-03 02:32:32,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:32,226 INFO L225 Difference]: With dead ends: 59 [2022-11-03 02:32:32,226 INFO L226 Difference]: Without dead ends: 47 [2022-11-03 02:32:32,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2601 ImplicationChecksByTransitivity, 121.4s TimeCoverageRelationStatistics Valid=902, Invalid=5229, Unknown=31, NotChecked=0, Total=6162 [2022-11-03 02:32:32,229 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:32,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 73 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 29 Unchecked, 0.4s Time] [2022-11-03 02:32:32,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-03 02:32:32,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-03 02:32:32,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:32:32,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2022-11-03 02:32:32,241 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 27 [2022-11-03 02:32:32,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:32,241 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2022-11-03 02:32:32,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.4109589041095891) internal successors, (103), 73 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:32:32,242 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2022-11-03 02:32:32,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 02:32:32,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:32,243 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:32,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:32,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:32,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:32,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:32:32,846 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:32,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:32,846 INFO L85 PathProgramCache]: Analyzing trace with hash -774428629, now seen corresponding path program 1 times [2022-11-03 02:32:32,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:32:32,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151327126] [2022-11-03 02:32:32,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:32,847 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:32:32,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:32:32,848 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:32:32,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:32:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:32,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:32:32,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:33,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:32:33,247 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-03 02:32:33,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-03 02:32:33,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 02:32:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:32:33,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:33,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-03 02:32:33,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-03 02:32:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:32:33,780 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:32:33,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151327126] [2022-11-03 02:32:33,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [151327126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:33,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1815777879] [2022-11-03 02:32:33,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:33,781 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:32:33,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:32:33,782 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:32:33,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 02:32:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:33,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:32:33,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:34,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:32:34,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:34,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-03 02:32:34,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:32:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:32:34,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:34,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-03 02:32:34,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-03 02:32:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:32:34,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1815777879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:34,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086818392] [2022-11-03 02:32:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:34,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:34,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:34,896 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:32:34,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 02:32:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:34,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:32:34,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:35,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:32:35,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:35,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-03 02:32:35,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:32:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:32:35,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:35,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-03 02:32:35,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-03 02:32:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:32:35,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086818392] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:35,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:32:35,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 17 [2022-11-03 02:32:35,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21269147] [2022-11-03 02:32:35,367 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:32:35,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:32:35,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:32:35,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:32:35,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:32:35,369 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:32:36,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:36,304 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2022-11-03 02:32:36,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:32:36,305 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-03 02:32:36,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:36,306 INFO L225 Difference]: With dead ends: 69 [2022-11-03 02:32:36,306 INFO L226 Difference]: Without dead ends: 40 [2022-11-03 02:32:36,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:32:36,308 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:36,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 59 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:32:36,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-03 02:32:36,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-11-03 02:32:36,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:32:36,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-11-03 02:32:36,323 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 27 [2022-11-03 02:32:36,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:36,324 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-11-03 02:32:36,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:32:36,324 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-11-03 02:32:36,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 02:32:36,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:36,325 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:36,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:36,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:36,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:36,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:36,928 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:36,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:36,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1292373713, now seen corresponding path program 5 times [2022-11-03 02:32:36,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:32:36,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475925986] [2022-11-03 02:32:36,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:32:36,930 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:32:36,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:32:36,930 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:32:36,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:32:37,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-03 02:32:37,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:32:37,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:32:37,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:32:38,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:32:39,915 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:32:39,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475925986] [2022-11-03 02:32:39,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475925986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:39,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1550626715] [2022-11-03 02:32:39,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:32:39,916 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:32:39,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:32:39,917 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:32:39,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-03 02:32:40,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-03 02:32:40,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:32:40,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:32:40,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:32:41,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:32:41,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1550626715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:41,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188941634] [2022-11-03 02:32:41,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:32:41,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:41,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:41,757 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:32:41,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-03 02:32:42,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-03 02:32:42,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:32:42,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:32:42,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:32:42,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:32:42,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188941634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:42,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:32:42,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 13, 12, 14, 12] total 31 [2022-11-03 02:32:42,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639137738] [2022-11-03 02:32:42,922 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:32:42,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 02:32:42,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:32:42,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 02:32:42,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:32:42,924 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 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) [2022-11-03 02:32:47,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:47,588 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2022-11-03 02:32:47,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:32:47,589 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 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 29 [2022-11-03 02:32:47,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:47,590 INFO L225 Difference]: With dead ends: 88 [2022-11-03 02:32:47,590 INFO L226 Difference]: Without dead ends: 69 [2022-11-03 02:32:47,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=496, Invalid=1666, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 02:32:47,592 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 332 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:47,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 31 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 02:32:47,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-03 02:32:47,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2022-11-03 02:32:47,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:32:47,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-11-03 02:32:47,605 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 29 [2022-11-03 02:32:47,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:47,606 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-11-03 02:32:47,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 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) [2022-11-03 02:32:47,606 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-11-03 02:32:47,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:32:47,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:47,608 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:47,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:47,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:48,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:48,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:32:48,220 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:48,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:48,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1250534543, now seen corresponding path program 6 times [2022-11-03 02:32:48,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:32:48,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746071432] [2022-11-03 02:32:48,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:32:48,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:32:48,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:32:48,222 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:32:48,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 02:32:48,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-03 02:32:48,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:32:48,418 WARN L261 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 02:32:48,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:48,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:48,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:32:48,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 02:32:48,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:32:49,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:32:49,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:32:50,144 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:32:50,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-11-03 02:32:50,988 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:32:50,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 56 [2022-11-03 02:32:52,021 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:32:52,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 61 [2022-11-03 02:32:52,923 INFO L356 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-03 02:32:52,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 108 treesize of output 82 [2022-11-03 02:32:53,752 INFO L356 Elim1Store]: treesize reduction 60, result has 1.6 percent of original size [2022-11-03 02:32:53,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 140 treesize of output 108 [2022-11-03 02:32:55,145 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:32:55,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 174 treesize of output 113 [2022-11-03 02:32:55,763 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:32:55,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 200 treesize of output 142 [2022-11-03 02:32:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:32:55,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:41,282 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:35:41,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 3961 treesize of output 1239 [2022-11-03 02:36:11,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,210 INFO L356 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-03 02:36:11,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 2506 treesize of output 1 [2022-11-03 02:36:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:11,214 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:11,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746071432] [2022-11-03 02:36:11,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746071432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:11,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [34134168] [2022-11-03 02:36:11,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:36:11,215 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:11,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:36:11,217 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:36:11,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-03 02:36:11,429 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:36:11,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499864420] [2022-11-03 02:36:11,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:36:11,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:11,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:11,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 1 [2022-11-03 02:36:11,436 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:11,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff930b67-7031-4e52-93d1-4a08002ba461/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-03 02:36:11,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-03 02:36:11,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:36:11,686 WARN L261 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-03 02:36:11,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:11,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 02:36:11,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:11,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:36:11,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:36:13,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:36:14,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:36:16,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:36:18,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:18,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 41 [2022-11-03 02:36:22,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:36:22,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:22,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:36:22,648 INFO L356 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2022-11-03 02:36:22,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 65 treesize of output 54 [2022-11-03 02:36:27,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:27,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:27,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:36:27,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:27,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:27,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:36:27,230 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 02:36:27,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 10 case distinctions, treesize of input 77 treesize of output 69 [2022-11-03 02:36:32,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:32,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:36:32,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:36:32,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:32,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:32,983 INFO L356 Elim1Store]: treesize reduction 107, result has 15.7 percent of original size [2022-11-03 02:36:32,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 106 treesize of output 72 [2022-11-03 02:36:35,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:35,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:36:35,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:35,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:36:35,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:35,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:35,781 INFO L356 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-03 02:36:35,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 126 treesize of output 86 [2022-11-03 02:36:38,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:38,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:38,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:38,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:38,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:36:38,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:38,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:36:38,708 INFO L356 Elim1Store]: treesize reduction 67, result has 22.1 percent of original size [2022-11-03 02:36:38,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 170 treesize of output 114 [2022-11-03 02:36:44,586 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-03 02:36:44,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 170 treesize of output 130 [2022-11-03 02:36:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:36:44,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:23,578 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:41:23,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 3961 treesize of output 1239 [2022-11-03 02:42:21,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:21,979 INFO L356 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-11-03 02:42:21,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 2206 treesize of output 1 [2022-11-03 02:42:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:21,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499864420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:21,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-03 02:42:21,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 27, 26] total 91 [2022-11-03 02:42:21,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945985287] [2022-11-03 02:42:21,986 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-03 02:42:21,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-03 02:42:21,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:21,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-03 02:42:21,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=6985, Unknown=71, NotChecked=0, Total=8190 [2022-11-03 02:42:21,992 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 91 states, 91 states have (on average 1.3076923076923077) internal successors, (119), 91 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:27,533 WARN L234 SmtUtils]: Spent 14.89s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:43:29,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:31,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:33,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:35,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:38,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:40,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:42,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:45,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:46,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []