./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur --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 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c --- 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-38b53e6 [2022-11-25 23:34:24,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:34:24,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:34:24,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:34:24,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:34:24,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:34:24,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:34:24,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:34:24,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:34:24,664 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:34:24,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:34:24,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:34:24,670 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:34:24,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:34:24,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:34:24,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:34:24,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:34:24,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:34:24,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:34:24,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:34:24,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:34:24,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:34:24,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:34:24,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:34:24,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:34:24,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:34:24,711 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:34:24,712 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:34:24,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:34:24,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:34:24,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:34:24,717 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:34:24,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:34:24,721 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:34:24,722 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:34:24,723 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:34:24,724 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:34:24,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:34:24,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:34:24,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:34:24,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:34:24,728 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:34:24,769 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:34:24,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:34:24,770 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:34:24,771 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:34:24,772 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:34:24,772 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:34:24,772 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:34:24,773 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:34:24,773 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:34:24,773 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:34:24,774 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:34:24,775 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:34:24,775 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:34:24,775 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:34:24,775 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:34:24,775 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:34:24,776 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:34:24,776 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:34:24,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:34:24,778 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:34:24,778 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:34:24,778 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:34:24,778 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:34:24,778 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:34:24,779 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:34:24,779 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:34:24,780 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:34:24,780 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:34:24,780 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:34:24,780 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:34:24,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:34:24,781 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:34:24,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:34:24,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:34:24,782 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:34:24,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:34:24,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:34:24,783 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:34:24,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:34:24,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:34:24,784 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:34:24,785 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_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c [2022-11-25 23:34:25,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:34:25,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:34:25,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:34:25,113 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:34:25,113 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:34:25,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2022-11-25 23:34:28,245 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:34:28,528 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:34:28,528 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2022-11-25 23:34:28,536 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/data/28cdf705b/7fe8be1d0f4946fd9fb821550518efb0/FLAG2b0fb190d [2022-11-25 23:34:28,554 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/data/28cdf705b/7fe8be1d0f4946fd9fb821550518efb0 [2022-11-25 23:34:28,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:34:28,558 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:34:28,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:34:28,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:34:28,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:34:28,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:34:28" (1/1) ... [2022-11-25 23:34:28,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6968ac27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:28, skipping insertion in model container [2022-11-25 23:34:28,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:34:28" (1/1) ... [2022-11-25 23:34:28,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:34:28,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:34:28,763 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2022-11-25 23:34:28,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:34:28,817 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:34:28,837 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2022-11-25 23:34:28,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:34:28,881 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:34:28,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:28 WrapperNode [2022-11-25 23:34:28,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:34:28,884 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:34:28,884 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:34:28,884 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:34:28,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:28" (1/1) ... [2022-11-25 23:34:28,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:28" (1/1) ... [2022-11-25 23:34:28,947 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-11-25 23:34:28,948 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:34:28,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:34:28,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:34:28,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:34:28,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:28" (1/1) ... [2022-11-25 23:34:28,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:28" (1/1) ... [2022-11-25 23:34:28,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:28" (1/1) ... [2022-11-25 23:34:28,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:28" (1/1) ... [2022-11-25 23:34:28,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:28" (1/1) ... [2022-11-25 23:34:28,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:28" (1/1) ... [2022-11-25 23:34:28,984 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:28" (1/1) ... [2022-11-25 23:34:28,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:28" (1/1) ... [2022-11-25 23:34:28,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:34:28,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:34:28,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:34:28,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:34:28,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:28" (1/1) ... [2022-11-25 23:34:29,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:34:29,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:34:29,041 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:34:29,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:34:29,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:34:29,081 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 23:34:29,081 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 23:34:29,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:34:29,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:34:29,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:34:29,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:34:29,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:34:29,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:34:29,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:34:29,147 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:34:29,149 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:34:29,371 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:34:29,434 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:34:29,435 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 23:34:29,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:34:29 BoogieIcfgContainer [2022-11-25 23:34:29,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:34:29,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:34:29,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:34:29,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:34:29,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:34:28" (1/3) ... [2022-11-25 23:34:29,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f97b3aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:34:29, skipping insertion in model container [2022-11-25 23:34:29,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:34:28" (2/3) ... [2022-11-25 23:34:29,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f97b3aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:34:29, skipping insertion in model container [2022-11-25 23:34:29,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:34:29" (3/3) ... [2022-11-25 23:34:29,449 INFO L112 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2022-11-25 23:34:29,473 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:34:29,473 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:34:29,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:34:29,543 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;@94ba992, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:34:29,544 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:34:29,549 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:34:29,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 23:34:29,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:29,563 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:34:29,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:34:29,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:29,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1232094444, now seen corresponding path program 1 times [2022-11-25 23:34:29,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:29,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251790559] [2022-11-25 23:34:29,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:29,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:34:30,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:30,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251790559] [2022-11-25 23:34:30,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251790559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:34:30,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:34:30,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:34:30,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138598106] [2022-11-25 23:34:30,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:34:30,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:34:30,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:30,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:34:30,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:34:30,254 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:34:30,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:34:30,337 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-11-25 23:34:30,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:34:30,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2022-11-25 23:34:30,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:34:30,350 INFO L225 Difference]: With dead ends: 25 [2022-11-25 23:34:30,350 INFO L226 Difference]: Without dead ends: 16 [2022-11-25 23:34:30,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:34:30,357 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:34:30,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:34:30,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-25 23:34:30,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-25 23:34:30,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:34:30,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-25 23:34:30,405 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 14 [2022-11-25 23:34:30,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:30,407 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-25 23:34:30,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:34:30,408 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-25 23:34:30,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 23:34:30,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:30,410 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:34:30,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:34:30,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:34:30,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:30,428 INFO L85 PathProgramCache]: Analyzing trace with hash -460272811, now seen corresponding path program 1 times [2022-11-25 23:34:30,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:30,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342120833] [2022-11-25 23:34:30,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:30,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:34:30,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:30,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342120833] [2022-11-25 23:34:30,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342120833] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:34:30,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:34:30,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:34:30,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941494741] [2022-11-25 23:34:30,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:34:30,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:34:30,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:30,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:34:30,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:34:30,667 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 23:34:30,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:34:30,759 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2022-11-25 23:34:30,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:34:30,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2022-11-25 23:34:30,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:34:30,761 INFO L225 Difference]: With dead ends: 28 [2022-11-25 23:34:30,762 INFO L226 Difference]: Without dead ends: 20 [2022-11-25 23:34:30,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:34:30,764 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:34:30,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 35 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:34:30,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-25 23:34:30,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-11-25 23:34:30,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:34:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-11-25 23:34:30,773 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2022-11-25 23:34:30,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:30,774 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-11-25 23:34:30,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 23:34:30,774 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-11-25 23:34:30,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 23:34:30,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:30,775 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:34:30,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:34:30,776 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:34:30,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:30,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1912132504, now seen corresponding path program 1 times [2022-11-25 23:34:30,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:30,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481473315] [2022-11-25 23:34:30,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:30,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:34:31,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:31,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481473315] [2022-11-25 23:34:31,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481473315] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:34:31,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149320732] [2022-11-25 23:34:31,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:31,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:31,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:34:31,815 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:34:31,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:34:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:31,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 23:34:31,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:34:32,169 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 23:34:32,235 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 23:34:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:34:32,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:34:34,444 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:34:34,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:34:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:34:34,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149320732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:34:34,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [12377363] [2022-11-25 23:34:34,584 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:34:34,584 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:34:34,591 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:34:34,598 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:34:34,599 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:34:34,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:34,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:34,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:34,979 INFO L321 Elim1Store]: treesize reduction 80, result has 33.3 percent of original size [2022-11-25 23:34:34,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 63 [2022-11-25 23:34:35,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:35,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:35,132 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 23:34:35,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 23:34:37,509 INFO L321 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-25 23:34:37,510 INFO L350 Elim1Store]: Elim1 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 9 case distinctions, treesize of input 266 treesize of output 312 [2022-11-25 23:34:38,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:34:38,241 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-25 23:34:38,242 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 31 [2022-11-25 23:34:38,392 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:34:38,393 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:34:39,855 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '304#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:34:39,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:34:39,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:34:39,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-11-25 23:34:39,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51002373] [2022-11-25 23:34:39,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:34:39,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 23:34:39,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:39,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 23:34:39,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=965, Unknown=1, NotChecked=0, Total=1122 [2022-11-25 23:34:39,866 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 23:34:40,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:34:40,176 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-11-25 23:34:40,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:34:40,178 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 21 [2022-11-25 23:34:40,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:34:40,179 INFO L225 Difference]: With dead ends: 26 [2022-11-25 23:34:40,179 INFO L226 Difference]: Without dead ends: 23 [2022-11-25 23:34:40,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=171, Invalid=1088, Unknown=1, NotChecked=0, Total=1260 [2022-11-25 23:34:40,181 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:34:40,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 94 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:34:40,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-25 23:34:40,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-11-25 23:34:40,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:34:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-11-25 23:34:40,193 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 21 [2022-11-25 23:34:40,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:40,195 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-11-25 23:34:40,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 23:34:40,195 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-11-25 23:34:40,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 23:34:40,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:40,199 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:34:40,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:34:40,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:40,405 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:34:40,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:40,406 INFO L85 PathProgramCache]: Analyzing trace with hash -853929431, now seen corresponding path program 2 times [2022-11-25 23:34:40,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:40,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232653905] [2022-11-25 23:34:40,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:40,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 23:34:40,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:40,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232653905] [2022-11-25 23:34:40,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232653905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:34:40,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676870575] [2022-11-25 23:34:40,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:34:40,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:40,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:34:40,558 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:34:40,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:34:40,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:34:40,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:34:40,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:34:40,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:34:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 23:34:40,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:34:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 23:34:40,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676870575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:34:40,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [362935691] [2022-11-25 23:34:40,751 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:34:40,757 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:34:40,757 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:34:40,758 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:34:40,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:34:40,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:40,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:40,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:40,979 INFO L321 Elim1Store]: treesize reduction 80, result has 33.3 percent of original size [2022-11-25 23:34:40,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 63 [2022-11-25 23:34:41,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:41,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:41,109 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 23:34:41,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 23:34:42,836 INFO L321 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-25 23:34:42,837 INFO L350 Elim1Store]: Elim1 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 9 case distinctions, treesize of input 266 treesize of output 312 [2022-11-25 23:34:43,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:34:43,240 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-25 23:34:43,240 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 31 [2022-11-25 23:34:43,367 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:34:43,368 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:34:44,580 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '530#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:34:44,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:34:44,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:34:44,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-25 23:34:44,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933892077] [2022-11-25 23:34:44,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:34:44,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 23:34:44,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:44,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 23:34:44,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-11-25 23:34:44,583 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 23:34:44,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:34:44,740 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-11-25 23:34:44,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:34:44,742 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22 [2022-11-25 23:34:44,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:34:44,743 INFO L225 Difference]: With dead ends: 38 [2022-11-25 23:34:44,743 INFO L226 Difference]: Without dead ends: 28 [2022-11-25 23:34:44,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-11-25 23:34:44,745 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:34:44,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 58 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:34:44,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-25 23:34:44,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-11-25 23:34:44,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:34:44,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-25 23:34:44,759 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 22 [2022-11-25 23:34:44,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:44,759 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-25 23:34:44,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 23:34:44,760 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-25 23:34:44,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 23:34:44,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:44,762 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:34:44,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:34:44,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:44,969 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:34:44,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:44,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1239390197, now seen corresponding path program 3 times [2022-11-25 23:34:44,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:44,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846891154] [2022-11-25 23:34:44,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:44,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 23:34:45,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:45,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846891154] [2022-11-25 23:34:45,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846891154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:34:45,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69598453] [2022-11-25 23:34:45,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:34:45,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:45,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:34:45,083 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:34:45,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:34:45,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:34:45,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:34:45,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:34:45,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:34:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 23:34:45,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:34:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 23:34:45,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69598453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:34:45,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1701221679] [2022-11-25 23:34:45,265 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:34:45,265 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:34:45,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:34:45,266 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:34:45,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:34:45,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:45,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:45,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:45,453 INFO L321 Elim1Store]: treesize reduction 80, result has 33.3 percent of original size [2022-11-25 23:34:45,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 63 [2022-11-25 23:34:45,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:45,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:45,574 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 23:34:45,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 23:34:47,119 INFO L321 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-25 23:34:47,120 INFO L350 Elim1Store]: Elim1 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 9 case distinctions, treesize of input 266 treesize of output 312 [2022-11-25 23:34:47,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:34:47,473 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-25 23:34:47,473 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 31 [2022-11-25 23:34:47,601 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:34:47,603 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:34:48,743 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '809#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:34:48,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:34:48,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:34:48,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-25 23:34:48,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437026536] [2022-11-25 23:34:48,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:34:48,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 23:34:48,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:48,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 23:34:48,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-11-25 23:34:48,746 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-25 23:34:48,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:34:48,870 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-11-25 23:34:48,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:34:48,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2022-11-25 23:34:48,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:34:48,873 INFO L225 Difference]: With dead ends: 26 [2022-11-25 23:34:48,873 INFO L226 Difference]: Without dead ends: 23 [2022-11-25 23:34:48,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-11-25 23:34:48,874 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:34:48,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 40 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:34:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-25 23:34:48,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-25 23:34:48,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:34:48,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-11-25 23:34:48,881 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 27 [2022-11-25 23:34:48,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:48,881 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-11-25 23:34:48,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-25 23:34:48,882 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-11-25 23:34:48,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 23:34:48,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:48,888 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:34:48,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:34:49,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:49,096 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:34:49,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:49,097 INFO L85 PathProgramCache]: Analyzing trace with hash -234104468, now seen corresponding path program 4 times [2022-11-25 23:34:49,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:49,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516533042] [2022-11-25 23:34:49,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:49,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:34:50,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:50,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516533042] [2022-11-25 23:34:50,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516533042] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:34:50,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983979269] [2022-11-25 23:34:50,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:34:50,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:50,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:34:50,568 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:34:50,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:34:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:50,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 23:34:50,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:34:50,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-25 23:34:50,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:50,944 INFO L350 Elim1Store]: Elim1 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 39 treesize of output 37 [2022-11-25 23:34:51,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:51,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2022-11-25 23:34:51,259 INFO L350 Elim1Store]: Elim1 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 63 treesize of output 23 [2022-11-25 23:34:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:34:51,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:34:51,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983979269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:34:51,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [515345147] [2022-11-25 23:34:51,968 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:34:51,969 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:34:51,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:34:51,972 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:34:51,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:34:52,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:52,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:52,184 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 23:34:52,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 23:34:52,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:52,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:52,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:52,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 45 [2022-11-25 23:34:53,630 INFO L321 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-11-25 23:34:53,630 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-25 23:34:53,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:34:53,686 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-25 23:34:53,687 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 31 [2022-11-25 23:34:53,785 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:34:53,786 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:34:55,299 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1054#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:34:55,299 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:34:55,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:34:55,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2022-11-25 23:34:55,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585002646] [2022-11-25 23:34:55,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:34:55,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 23:34:55,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:55,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 23:34:55,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-11-25 23:34:55,303 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 25 states, 23 states have (on average 1.391304347826087) internal successors, (32), 25 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:34:57,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:34:58,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:34:58,534 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-11-25 23:34:58,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 23:34:58,535 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.391304347826087) internal successors, (32), 25 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 28 [2022-11-25 23:34:58,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:34:58,541 INFO L225 Difference]: With dead ends: 41 [2022-11-25 23:34:58,541 INFO L226 Difference]: Without dead ends: 37 [2022-11-25 23:34:58,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=376, Invalid=2930, Unknown=0, NotChecked=0, Total=3306 [2022-11-25 23:34:58,546 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:34:58,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 70 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 356 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-25 23:34:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-25 23:34:58,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2022-11-25 23:34:58,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:34:58,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-11-25 23:34:58,568 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 28 [2022-11-25 23:34:58,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:58,569 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-11-25 23:34:58,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.391304347826087) internal successors, (32), 25 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:34:58,569 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-11-25 23:34:58,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 23:34:58,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:58,570 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:34:58,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:34:58,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:58,776 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:34:58,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:58,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1332201173, now seen corresponding path program 5 times [2022-11-25 23:34:58,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:58,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85415956] [2022-11-25 23:34:58,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:58,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 23:34:58,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:58,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85415956] [2022-11-25 23:34:58,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85415956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:34:58,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320034295] [2022-11-25 23:34:58,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:34:58,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:58,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:34:58,904 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:34:58,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:34:58,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:34:58,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:34:58,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:34:58,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:34:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 23:34:59,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:34:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 23:34:59,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320034295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:34:59,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [593614045] [2022-11-25 23:34:59,104 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:34:59,105 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:34:59,107 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:34:59,107 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:34:59,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:34:59,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:59,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:59,267 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 23:34:59,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 23:34:59,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:59,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:59,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:34:59,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 45 [2022-11-25 23:35:00,669 INFO L321 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-25 23:35:00,670 INFO L350 Elim1Store]: Elim1 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 9 case distinctions, treesize of input 265 treesize of output 311 [2022-11-25 23:35:01,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:01,022 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-25 23:35:01,022 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 31 [2022-11-25 23:35:01,124 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:35:01,125 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:35:02,131 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1385#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:35:02,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:35:02,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:35:02,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-11-25 23:35:02,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429635011] [2022-11-25 23:35:02,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:35:02,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 23:35:02,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:02,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 23:35:02,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-11-25 23:35:02,133 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-25 23:35:02,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:02,308 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2022-11-25 23:35:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 23:35:02,308 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 29 [2022-11-25 23:35:02,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:02,308 INFO L225 Difference]: With dead ends: 52 [2022-11-25 23:35:02,309 INFO L226 Difference]: Without dead ends: 37 [2022-11-25 23:35:02,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-11-25 23:35:02,310 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:02,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 68 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:35:02,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-25 23:35:02,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2022-11-25 23:35:02,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-25 23:35:02,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-11-25 23:35:02,320 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 29 [2022-11-25 23:35:02,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:02,320 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-11-25 23:35:02,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-25 23:35:02,320 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-11-25 23:35:02,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 23:35:02,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:02,321 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:02,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-25 23:35:02,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:02,527 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:35:02,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:02,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1872081512, now seen corresponding path program 6 times [2022-11-25 23:35:02,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:02,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435254780] [2022-11-25 23:35:02,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:02,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:35:05,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:05,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435254780] [2022-11-25 23:35:05,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435254780] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:35:05,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313496757] [2022-11-25 23:35:05,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:35:05,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:05,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:35:05,925 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:35:05,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:35:06,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:35:06,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:35:06,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-25 23:35:06,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:35:06,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-25 23:35:06,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:06,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:06,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 50 [2022-11-25 23:35:06,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:06,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:06,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:06,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:06,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 70 [2022-11-25 23:35:06,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:06,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:06,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 83 [2022-11-25 23:35:07,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 47 [2022-11-25 23:35:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:35:07,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:35:08,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313496757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:35:08,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1195155274] [2022-11-25 23:35:08,508 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:35:08,508 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:35:08,508 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:35:08,508 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:35:08,509 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:35:08,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:08,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:08,670 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 23:35:08,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 23:35:08,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:08,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:08,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:08,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 45 [2022-11-25 23:35:09,971 INFO L321 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-11-25 23:35:09,972 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 32 treesize of output 56 [2022-11-25 23:35:10,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:10,035 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-25 23:35:10,035 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 31 [2022-11-25 23:35:10,126 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:35:10,127 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:35:11,854 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1721#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:35:11,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:35:11,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:35:11,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 32 [2022-11-25 23:35:11,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842442819] [2022-11-25 23:35:11,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:35:11,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 23:35:11,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:11,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 23:35:11,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2582, Unknown=0, NotChecked=0, Total=2862 [2022-11-25 23:35:11,858 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-25 23:35:15,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:35:16,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:16,259 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-11-25 23:35:16,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 23:35:16,260 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 35 [2022-11-25 23:35:16,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:16,261 INFO L225 Difference]: With dead ends: 55 [2022-11-25 23:35:16,261 INFO L226 Difference]: Without dead ends: 51 [2022-11-25 23:35:16,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=576, Invalid=4536, Unknown=0, NotChecked=0, Total=5112 [2022-11-25 23:35:16,263 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:16,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 91 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 559 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-11-25 23:35:16,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-25 23:35:16,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2022-11-25 23:35:16,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 23:35:16,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2022-11-25 23:35:16,280 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 35 [2022-11-25 23:35:16,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:16,281 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2022-11-25 23:35:16,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-25 23:35:16,281 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2022-11-25 23:35:16,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 23:35:16,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:16,282 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:16,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:35:16,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:16,487 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:35:16,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:16,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1785004767, now seen corresponding path program 7 times [2022-11-25 23:35:16,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:16,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458008462] [2022-11-25 23:35:16,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:16,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 23:35:16,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:16,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458008462] [2022-11-25 23:35:16,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458008462] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:35:16,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752950128] [2022-11-25 23:35:16,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:35:16,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:16,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:35:16,627 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:35:16,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:35:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:16,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:35:16,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:35:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-25 23:35:16,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:35:17,005 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-25 23:35:17,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752950128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:35:17,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [169161593] [2022-11-25 23:35:17,007 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:35:17,007 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:35:17,007 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:35:17,007 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:35:17,008 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:35:17,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:17,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:17,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:17,182 INFO L321 Elim1Store]: treesize reduction 80, result has 33.3 percent of original size [2022-11-25 23:35:17,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 63 [2022-11-25 23:35:17,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:17,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:17,292 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 23:35:17,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 23:35:18,689 INFO L321 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-25 23:35:18,689 INFO L350 Elim1Store]: Elim1 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 9 case distinctions, treesize of input 266 treesize of output 312 [2022-11-25 23:35:18,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:19,000 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-25 23:35:19,001 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 31 [2022-11-25 23:35:19,100 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:35:19,101 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:35:20,335 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2157#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:35:20,335 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:35:20,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:35:20,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-11-25 23:35:20,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082521170] [2022-11-25 23:35:20,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:35:20,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 23:35:20,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:20,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 23:35:20,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 23:35:20,338 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-25 23:35:20,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:20,819 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2022-11-25 23:35:20,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 23:35:20,828 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 35 [2022-11-25 23:35:20,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:20,829 INFO L225 Difference]: With dead ends: 59 [2022-11-25 23:35:20,829 INFO L226 Difference]: Without dead ends: 42 [2022-11-25 23:35:20,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=308, Invalid=2044, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 23:35:20,831 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:20,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 106 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:35:20,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-25 23:35:20,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-11-25 23:35:20,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 23:35:20,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-11-25 23:35:20,846 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 35 [2022-11-25 23:35:20,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:20,846 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-11-25 23:35:20,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-25 23:35:20,846 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-11-25 23:35:20,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-25 23:35:20,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:20,847 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:20,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:35:21,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:21,053 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:35:21,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:21,053 INFO L85 PathProgramCache]: Analyzing trace with hash -8328893, now seen corresponding path program 8 times [2022-11-25 23:35:21,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:21,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007708982] [2022-11-25 23:35:21,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:21,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 23:35:21,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:21,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007708982] [2022-11-25 23:35:21,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007708982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:35:21,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030494114] [2022-11-25 23:35:21,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:35:21,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:21,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:35:21,228 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:35:21,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:35:21,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 23:35:21,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:35:21,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-25 23:35:21,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:35:21,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-25 23:35:21,840 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-25 23:35:21,840 INFO L350 Elim1Store]: Elim1 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 6 case distinctions, treesize of input 69 treesize of output 77 [2022-11-25 23:35:21,935 INFO L321 Elim1Store]: treesize reduction 60, result has 1.6 percent of original size [2022-11-25 23:35:21,936 INFO L350 Elim1Store]: Elim1 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 10 case distinctions, treesize of input 76 treesize of output 90 [2022-11-25 23:35:22,095 INFO L321 Elim1Store]: treesize reduction 150, result has 16.2 percent of original size [2022-11-25 23:35:22,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 223 treesize of output 147 [2022-11-25 23:35:54,827 WARN L233 SmtUtils]: Spent 18.09s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:35:56,141 INFO L321 Elim1Store]: treesize reduction 107, result has 29.1 percent of original size [2022-11-25 23:35:56,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 255 treesize of output 96 [2022-11-25 23:35:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 23:35:56,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:36:07,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030494114] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:36:07,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [635870114] [2022-11-25 23:36:07,202 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:36:07,202 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:36:07,202 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:36:07,202 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:36:07,203 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:36:07,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:07,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:07,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:07,367 INFO L321 Elim1Store]: treesize reduction 80, result has 33.3 percent of original size [2022-11-25 23:36:07,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 63 [2022-11-25 23:36:07,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:07,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:07,470 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 23:36:07,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 23:36:08,648 INFO L321 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-11-25 23:36:08,648 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 32 treesize of output 56 [2022-11-25 23:36:08,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:36:08,715 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-25 23:36:08,715 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 31 [2022-11-25 23:36:08,815 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:36:08,816 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:36:10,809 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2555#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:36:10,809 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:36:10,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:36:10,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2022-11-25 23:36:10,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737124468] [2022-11-25 23:36:10,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:36:10,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 23:36:10,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:10,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 23:36:10,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=2275, Unknown=11, NotChecked=0, Total=2550 [2022-11-25 23:36:10,812 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 9 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-25 23:36:12,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:36:15,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:36:17,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:36:19,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:36:23,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:36:31,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:36:37,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:36:39,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:36:44,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:36:46,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:36:52,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:37:04,988 WARN L233 SmtUtils]: Spent 10.13s on a formula simplification. DAG size of input: 102 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:37:17,277 WARN L233 SmtUtils]: Spent 12.11s on a formula simplification. DAG size of input: 100 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:37:19,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:37:19,990 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-11-25 23:37:19,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 23:37:19,990 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 9 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 40 [2022-11-25 23:37:19,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:37:19,991 INFO L225 Difference]: With dead ends: 40 [2022-11-25 23:37:19,991 INFO L226 Difference]: Without dead ends: 33 [2022-11-25 23:37:19,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 91.7s TimeCoverageRelationStatistics Valid=592, Invalid=4220, Unknown=18, NotChecked=0, Total=4830 [2022-11-25 23:37:19,993 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 50 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:37:19,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 95 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 390 Invalid, 11 Unknown, 0 Unchecked, 23.2s Time] [2022-11-25 23:37:19,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-25 23:37:20,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-25 23:37:20,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 23:37:20,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-11-25 23:37:20,010 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 40 [2022-11-25 23:37:20,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:37:20,010 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-11-25 23:37:20,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 9 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-25 23:37:20,011 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-11-25 23:37:20,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-25 23:37:20,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:37:20,012 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:37:20,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:37:20,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 23:37:20,217 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:37:20,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:37:20,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1648562708, now seen corresponding path program 9 times [2022-11-25 23:37:20,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:37:20,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072212697] [2022-11-25 23:37:20,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:37:20,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:37:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:37:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 23:37:24,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:37:24,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072212697] [2022-11-25 23:37:24,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072212697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:37:24,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741078468] [2022-11-25 23:37:24,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:37:24,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:37:24,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:37:24,764 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:37:24,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:37:24,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:37:24,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:37:24,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-25 23:37:24,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:37:24,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-25 23:37:25,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:25,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:25,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:25,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 62 [2022-11-25 23:37:25,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:25,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:37:25,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:25,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:25,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:25,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 82 [2022-11-25 23:37:26,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:26,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:26,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:26,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:26,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:26,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:26,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:37:26,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:26,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:26,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 102 [2022-11-25 23:37:26,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:26,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:26,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:26,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 243 treesize of output 132 [2022-11-25 23:37:27,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 81 [2022-11-25 23:37:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 23:37:27,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:37:29,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741078468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:37:29,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1775255864] [2022-11-25 23:37:29,979 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:37:29,980 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:37:29,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:37:29,980 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:37:29,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:37:30,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:30,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:30,134 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 23:37:30,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 23:37:30,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:30,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:30,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:30,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 45 [2022-11-25 23:37:31,335 INFO L321 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-25 23:37:31,335 INFO L350 Elim1Store]: Elim1 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 9 case distinctions, treesize of input 265 treesize of output 311 [2022-11-25 23:37:31,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:37:31,620 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-25 23:37:31,620 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 31 [2022-11-25 23:37:31,737 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:37:31,738 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:37:34,233 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2945#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:37:34,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:37:34,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:37:34,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 39 [2022-11-25 23:37:34,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104076876] [2022-11-25 23:37:34,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:37:34,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 23:37:34,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:37:34,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 23:37:34,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=3582, Unknown=0, NotChecked=0, Total=3906 [2022-11-25 23:37:34,237 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 39 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 39 states have internal predecessors, (48), 11 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 23:37:39,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:37:41,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:37:41,761 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-11-25 23:37:41,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-25 23:37:41,762 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 39 states have internal predecessors, (48), 11 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 42 [2022-11-25 23:37:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:37:41,762 INFO L225 Difference]: With dead ends: 58 [2022-11-25 23:37:41,763 INFO L226 Difference]: Without dead ends: 54 [2022-11-25 23:37:41,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2490 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=742, Invalid=7448, Unknown=0, NotChecked=0, Total=8190 [2022-11-25 23:37:41,767 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 73 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:37:41,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 62 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 892 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-11-25 23:37:41,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-25 23:37:41,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2022-11-25 23:37:41,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:37:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2022-11-25 23:37:41,792 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 42 [2022-11-25 23:37:41,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:37:41,792 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2022-11-25 23:37:41,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 39 states have internal predecessors, (48), 11 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 23:37:41,793 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2022-11-25 23:37:41,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 23:37:41,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:37:41,794 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:37:41,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:37:41,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:37:41,997 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:37:41,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:37:41,997 INFO L85 PathProgramCache]: Analyzing trace with hash 433668693, now seen corresponding path program 10 times [2022-11-25 23:37:41,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:37:41,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803960853] [2022-11-25 23:37:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:37:41,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:37:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:37:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-25 23:37:42,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:37:42,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803960853] [2022-11-25 23:37:42,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803960853] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:37:42,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142201477] [2022-11-25 23:37:42,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:37:42,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:37:42,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:37:42,239 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:37:42,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 23:37:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:37:42,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:37:42,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:37:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-25 23:37:42,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:37:42,633 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-25 23:37:42,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142201477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:37:42,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [857057471] [2022-11-25 23:37:42,635 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:37:42,635 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:37:42,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:37:42,635 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:37:42,636 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:37:42,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:42,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:42,799 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 23:37:42,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 23:37:42,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:42,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:42,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:42,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 45 [2022-11-25 23:37:43,937 INFO L321 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-11-25 23:37:43,937 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-25 23:37:43,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:37:44,000 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-25 23:37:44,001 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 31 [2022-11-25 23:37:44,098 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:37:44,099 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:37:45,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3459#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:37:45,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:37:45,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:37:45,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-25 23:37:45,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696891141] [2022-11-25 23:37:45,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:37:45,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 23:37:45,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:37:45,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 23:37:45,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 23:37:45,367 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-25 23:37:45,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:37:45,634 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2022-11-25 23:37:45,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:37:45,635 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 43 [2022-11-25 23:37:45,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:37:45,635 INFO L225 Difference]: With dead ends: 64 [2022-11-25 23:37:45,635 INFO L226 Difference]: Without dead ends: 43 [2022-11-25 23:37:45,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 99 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=226, Invalid=1180, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 23:37:45,637 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:37:45,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 61 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:37:45,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-25 23:37:45,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-11-25 23:37:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:37:45,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-11-25 23:37:45,661 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 43 [2022-11-25 23:37:45,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:37:45,661 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-11-25 23:37:45,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-25 23:37:45,662 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-11-25 23:37:45,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 23:37:45,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:37:45,663 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:37:45,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 23:37:45,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:37:45,882 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:37:45,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:37:45,883 INFO L85 PathProgramCache]: Analyzing trace with hash 127792201, now seen corresponding path program 11 times [2022-11-25 23:37:45,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:37:45,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757388654] [2022-11-25 23:37:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:37:45,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:37:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:37:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-25 23:37:46,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:37:46,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757388654] [2022-11-25 23:37:46,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757388654] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:37:46,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384588929] [2022-11-25 23:37:46,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:37:46,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:37:46,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:37:46,135 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:37:46,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 23:37:46,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 23:37:46,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:37:46,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:37:46,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:37:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-25 23:37:46,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:37:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-25 23:37:46,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384588929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:37:46,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [871237570] [2022-11-25 23:37:46,524 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:37:46,525 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:37:46,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:37:46,525 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:37:46,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:37:46,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:46,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:46,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:46,698 INFO L321 Elim1Store]: treesize reduction 80, result has 33.3 percent of original size [2022-11-25 23:37:46,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 63 [2022-11-25 23:37:46,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:46,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:46,826 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 23:37:46,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 23:37:47,994 INFO L321 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-11-25 23:37:47,994 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-25 23:37:48,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:37:48,066 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-25 23:37:48,066 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 31 [2022-11-25 23:37:48,162 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:37:48,164 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:37:49,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3955#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:37:49,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:37:49,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:37:49,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-25 23:37:49,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867181439] [2022-11-25 23:37:49,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:37:49,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 23:37:49,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:37:49,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 23:37:49,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 23:37:49,425 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-25 23:37:49,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:37:49,796 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-11-25 23:37:49,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 23:37:49,797 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 48 [2022-11-25 23:37:49,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:37:49,797 INFO L225 Difference]: With dead ends: 41 [2022-11-25 23:37:49,798 INFO L226 Difference]: Without dead ends: 38 [2022-11-25 23:37:49,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 115 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=268, Invalid=1538, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 23:37:49,799 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:37:49,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 78 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:37:49,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-25 23:37:49,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-25 23:37:49,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:37:49,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-11-25 23:37:49,823 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 48 [2022-11-25 23:37:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:37:49,823 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-11-25 23:37:49,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-25 23:37:49,824 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-11-25 23:37:49,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 23:37:49,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:37:49,825 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:37:49,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 23:37:50,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:37:50,031 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:37:50,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:37:50,031 INFO L85 PathProgramCache]: Analyzing trace with hash -333903976, now seen corresponding path program 12 times [2022-11-25 23:37:50,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:37:50,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004944800] [2022-11-25 23:37:50,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:37:50,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:37:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:37:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 23:37:57,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:37:57,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004944800] [2022-11-25 23:37:57,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004944800] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:37:57,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226980415] [2022-11-25 23:37:57,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:37:57,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:37:57,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:37:57,513 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:37:57,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 23:37:57,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:37:57,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:37:57,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-25 23:37:57,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:37:57,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-25 23:37:58,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:58,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:58,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:58,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:58,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:58,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:58,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:58,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:58,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:37:58,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 85 [2022-11-25 23:37:58,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:58,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:37:58,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:58,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:58,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:58,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 105 [2022-11-25 23:37:59,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:59,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:59,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:59,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:59,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:59,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:59,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 103 [2022-11-25 23:37:59,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:59,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:59,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:59,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:59,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:59,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:59,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:59,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:37:59,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:59,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:59,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:59,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:59,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 17 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 123 [2022-11-25 23:37:59,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:59,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:59,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:59,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:59,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 396 treesize of output 191 [2022-11-25 23:38:01,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 11 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 405 treesize of output 125 [2022-11-25 23:38:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 23:38:17,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:38:40,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226980415] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:38:40,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [356382723] [2022-11-25 23:38:40,308 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:38:40,308 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:38:40,308 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:38:40,309 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:38:40,309 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:38:40,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:40,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:40,482 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 23:38:40,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 23:38:40,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:40,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:40,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:40,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 45 [2022-11-25 23:38:41,838 INFO L321 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-11-25 23:38:41,839 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-25 23:38:41,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:38:41,906 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-25 23:38:41,906 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 31 [2022-11-25 23:38:42,029 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:38:42,031 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:38:45,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4373#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:38:45,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:38:45,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:38:45,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 45 [2022-11-25 23:38:45,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284623922] [2022-11-25 23:38:45,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:38:45,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-25 23:38:45,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:38:45,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-25 23:38:45,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=4649, Unknown=7, NotChecked=0, Total=4970 [2022-11-25 23:38:45,383 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 45 states, 43 states have (on average 1.302325581395349) internal successors, (56), 44 states have internal predecessors, (56), 13 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 23:38:52,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:38:55,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:38:55,969 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2022-11-25 23:38:55,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-25 23:38:55,970 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.302325581395349) internal successors, (56), 44 states have internal predecessors, (56), 13 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 49 [2022-11-25 23:38:55,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:38:55,971 INFO L225 Difference]: With dead ends: 58 [2022-11-25 23:38:55,971 INFO L226 Difference]: Without dead ends: 54 [2022-11-25 23:38:55,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=751, Invalid=9142, Unknown=7, NotChecked=0, Total=9900 [2022-11-25 23:38:55,974 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 80 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:38:55,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 119 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1213 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-11-25 23:38:55,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-25 23:38:56,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2022-11-25 23:38:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:38:56,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-11-25 23:38:56,009 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 49 [2022-11-25 23:38:56,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:38:56,010 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-11-25 23:38:56,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.302325581395349) internal successors, (56), 44 states have internal predecessors, (56), 13 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 23:38:56,010 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-11-25 23:38:56,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 23:38:56,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:56,011 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:38:56,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 23:38:56,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 23:38:56,218 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:38:56,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:56,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1761583575, now seen corresponding path program 13 times [2022-11-25 23:38:56,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:38:56,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262500658] [2022-11-25 23:38:56,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:56,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:38:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 16 proven. 40 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-25 23:38:56,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:38:56,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262500658] [2022-11-25 23:38:56,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262500658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:38:56,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948916180] [2022-11-25 23:38:56,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:38:56,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:38:56,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:38:56,532 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:38:56,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 23:38:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:56,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:38:56,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:38:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-25 23:38:56,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:38:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-25 23:38:57,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948916180] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:38:57,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1135107162] [2022-11-25 23:38:57,161 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:38:57,162 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:38:57,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:38:57,162 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:38:57,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:38:57,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:57,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:57,340 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 23:38:57,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 23:38:57,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:57,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:57,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:57,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 45 [2022-11-25 23:38:58,543 INFO L321 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-11-25 23:38:58,543 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-25 23:38:58,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:38:58,604 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-25 23:38:58,605 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 31 [2022-11-25 23:38:58,702 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 23:38:58,703 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:39:00,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4930#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:39:00,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:39:00,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:39:00,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-11-25 23:39:00,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961128] [2022-11-25 23:39:00,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:39:00,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 23:39:00,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:39:00,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 23:39:00,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 23:39:00,215 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-25 23:39:00,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:39:00,616 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2022-11-25 23:39:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 23:39:00,616 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 50 [2022-11-25 23:39:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:39:00,617 INFO L225 Difference]: With dead ends: 79 [2022-11-25 23:39:00,617 INFO L226 Difference]: Without dead ends: 55 [2022-11-25 23:39:00,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 117 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=279, Invalid=1443, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 23:39:00,619 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:39:00,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 85 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:39:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-25 23:39:00,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2022-11-25 23:39:00,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 23:39:00,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2022-11-25 23:39:00,655 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 50 [2022-11-25 23:39:00,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:39:00,656 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2022-11-25 23:39:00,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-25 23:39:00,656 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2022-11-25 23:39:00,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-25 23:39:00,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:39:00,657 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:39:00,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 23:39:00,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ca6cee6-afab-4c62-8934-140638ca4ef5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 23:39:00,858 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:39:00,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:39:00,858 INFO L85 PathProgramCache]: Analyzing trace with hash 499614316, now seen corresponding path program 14 times [2022-11-25 23:39:00,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:39:00,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878426997] [2022-11-25 23:39:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:00,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:39:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat