./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba --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 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 --- 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-b5237d8 [2022-11-22 00:27:20,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:27:20,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:27:20,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:27:20,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:27:20,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:27:20,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:27:20,737 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:27:20,739 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:27:20,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:27:20,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:27:20,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:27:20,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:27:20,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:27:20,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:27:20,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:27:20,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:27:20,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:27:20,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:27:20,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:27:20,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:27:20,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:27:20,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:27:20,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:27:20,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:27:20,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:27:20,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:27:20,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:27:20,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:27:20,785 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:27:20,785 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:27:20,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:27:20,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:27:20,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:27:20,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:27:20,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:27:20,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:27:20,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:27:20,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:27:20,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:27:20,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:27:20,796 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 00:27:20,839 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:27:20,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:27:20,840 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:27:20,840 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:27:20,841 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:27:20,841 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:27:20,842 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:27:20,842 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:27:20,842 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:27:20,842 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:27:20,843 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:27:20,844 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:27:20,844 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:27:20,844 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:27:20,844 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:27:20,844 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:27:20,845 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:27:20,845 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:27:20,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:27:20,846 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:27:20,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:27:20,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:27:20,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:27:20,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:27:20,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:27:20,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:27:20,848 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:27:20,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:27:20,848 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:27:20,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:27:20,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:27:20,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:27:20,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:27:20,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:27:20,850 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:27:20,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:27:20,850 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:27:20,850 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:27:20,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:27:20,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:27:20,851 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:27:20,851 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_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 [2022-11-22 00:27:21,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:27:21,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:27:21,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:27:21,168 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:27:21,168 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:27:21,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2022-11-22 00:27:24,209 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:27:24,425 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:27:24,425 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2022-11-22 00:27:24,432 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/data/10a2ba2b3/e919631f98a5406d8b8f7e4fd111202e/FLAG8bc73a528 [2022-11-22 00:27:24,446 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/data/10a2ba2b3/e919631f98a5406d8b8f7e4fd111202e [2022-11-22 00:27:24,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:27:24,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:27:24,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:27:24,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:27:24,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:27:24,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:27:24" (1/1) ... [2022-11-22 00:27:24,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af24da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:24, skipping insertion in model container [2022-11-22 00:27:24,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:27:24" (1/1) ... [2022-11-22 00:27:24,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:27:24,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:27:24,632 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_41b64707-d366-4c97-a62b-26b44dcf7328/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2022-11-22 00:27:24,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:27:24,664 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:27:24,676 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_41b64707-d366-4c97-a62b-26b44dcf7328/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2022-11-22 00:27:24,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:27:24,700 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:27:24,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:24 WrapperNode [2022-11-22 00:27:24,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:27:24,701 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:27:24,701 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:27:24,701 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:27:24,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:24" (1/1) ... [2022-11-22 00:27:24,713 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:24" (1/1) ... [2022-11-22 00:27:24,737 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 131 [2022-11-22 00:27:24,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:27:24,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:27:24,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:27:24,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:27:24,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:24" (1/1) ... [2022-11-22 00:27:24,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:24" (1/1) ... [2022-11-22 00:27:24,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:24" (1/1) ... [2022-11-22 00:27:24,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:24" (1/1) ... [2022-11-22 00:27:24,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:24" (1/1) ... [2022-11-22 00:27:24,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:24" (1/1) ... [2022-11-22 00:27:24,761 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:24" (1/1) ... [2022-11-22 00:27:24,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:24" (1/1) ... [2022-11-22 00:27:24,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:27:24,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:27:24,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:27:24,765 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:27:24,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:24" (1/1) ... [2022-11-22 00:27:24,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:27:24,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:27:24,798 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:27:24,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:27:24,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:27:24,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:27:24,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 00:27:24,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 00:27:24,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:27:24,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:27:24,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 00:27:24,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 00:27:24,972 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:27:24,987 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:27:25,355 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:27:25,467 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:27:25,468 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-22 00:27:25,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:27:25 BoogieIcfgContainer [2022-11-22 00:27:25,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:27:25,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:27:25,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:27:25,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:27:25,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:27:24" (1/3) ... [2022-11-22 00:27:25,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bfc9143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:27:25, skipping insertion in model container [2022-11-22 00:27:25,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:24" (2/3) ... [2022-11-22 00:27:25,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bfc9143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:27:25, skipping insertion in model container [2022-11-22 00:27:25,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:27:25" (3/3) ... [2022-11-22 00:27:25,480 INFO L112 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2022-11-22 00:27:25,500 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:27:25,500 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 00:27:25,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:27:25,582 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;@299c9384, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:27:25,583 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 00:27:25,587 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:25,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 00:27:25,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:27:25,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:27:25,595 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:27:25,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:27:25,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1379774409, now seen corresponding path program 1 times [2022-11-22 00:27:25,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:27:25,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877216216] [2022-11-22 00:27:25,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:25,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:27:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:27:25,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:27:25,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877216216] [2022-11-22 00:27:25,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877216216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:27:25,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:27:25,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:27:25,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045086638] [2022-11-22 00:27:25,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:27:25,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:27:25,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:27:25,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:27:25,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:27:25,930 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:26,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:27:26,032 INFO L93 Difference]: Finished difference Result 33 states and 51 transitions. [2022-11-22 00:27:26,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:27:26,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 00:27:26,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:27:26,043 INFO L225 Difference]: With dead ends: 33 [2022-11-22 00:27:26,043 INFO L226 Difference]: Without dead ends: 16 [2022-11-22 00:27:26,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:27:26,055 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:27:26,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:27:26,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-22 00:27:26,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-22 00:27:26,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:26,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 23 transitions. [2022-11-22 00:27:26,092 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 23 transitions. Word has length 9 [2022-11-22 00:27:26,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:27:26,093 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 23 transitions. [2022-11-22 00:27:26,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:26,093 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 23 transitions. [2022-11-22 00:27:26,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 00:27:26,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:27:26,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:27:26,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:27:26,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:27:26,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:27:26,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1484939476, now seen corresponding path program 1 times [2022-11-22 00:27:26,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:27:26,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699096695] [2022-11-22 00:27:26,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:26,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:27:26,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:26,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:27:26,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:27:26,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699096695] [2022-11-22 00:27:26,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699096695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:27:26,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:27:26,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:27:26,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888799560] [2022-11-22 00:27:26,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:27:26,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:27:26,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:27:26,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:27:26,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:27:26,280 INFO L87 Difference]: Start difference. First operand 16 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:26,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:27:26,326 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2022-11-22 00:27:26,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:27:26,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-22 00:27:26,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:27:26,327 INFO L225 Difference]: With dead ends: 29 [2022-11-22 00:27:26,327 INFO L226 Difference]: Without dead ends: 20 [2022-11-22 00:27:26,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:27:26,329 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:27:26,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 16 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:27:26,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-22 00:27:26,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-11-22 00:27:26,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:26,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 24 transitions. [2022-11-22 00:27:26,335 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 24 transitions. Word has length 10 [2022-11-22 00:27:26,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:27:26,336 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 24 transitions. [2022-11-22 00:27:26,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:26,336 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2022-11-22 00:27:26,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 00:27:26,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:27:26,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:27:26,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 00:27:26,337 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:27:26,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:27:26,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1350556832, now seen corresponding path program 1 times [2022-11-22 00:27:26,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:27:26,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10807019] [2022-11-22 00:27:26,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:26,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:27:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:27:26,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:27:26,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10807019] [2022-11-22 00:27:26,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10807019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:27:26,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:27:26,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:27:26,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307949017] [2022-11-22 00:27:26,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:27:26,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:27:26,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:27:26,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:27:26,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:27:26,411 INFO L87 Difference]: Start difference. First operand 17 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:26,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:27:26,451 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-11-22 00:27:26,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:27:26,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-22 00:27:26,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:27:26,453 INFO L225 Difference]: With dead ends: 27 [2022-11-22 00:27:26,454 INFO L226 Difference]: Without dead ends: 18 [2022-11-22 00:27:26,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:27:26,460 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:27:26,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 13 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:27:26,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-22 00:27:26,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-22 00:27:26,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:26,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-11-22 00:27:26,472 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 13 [2022-11-22 00:27:26,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:27:26,473 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-11-22 00:27:26,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:26,473 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2022-11-22 00:27:26,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 00:27:26,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:27:26,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:27:26,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 00:27:26,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:27:26,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:27:26,477 INFO L85 PathProgramCache]: Analyzing trace with hash 141282585, now seen corresponding path program 1 times [2022-11-22 00:27:26,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:27:26,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573675879] [2022-11-22 00:27:26,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:26,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:27:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:27:26,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:27:26,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573675879] [2022-11-22 00:27:26,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573675879] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:27:26,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192161509] [2022-11-22 00:27:26,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:26,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:26,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:27:26,822 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:27:26,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:27:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:26,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 00:27:26,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:27:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:27:27,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:27:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:27:27,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192161509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:27:27,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [189782547] [2022-11-22 00:27:27,112 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 00:27:27,112 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:27:27,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:27:27,121 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:27:27,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:27:27,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:27,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:27,397 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-22 00:27:27,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-22 00:27:27,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:27,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:27,530 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 00:27:27,534 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 [2022-11-22 00:27:27,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:27,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:27,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-22 00:27:27,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:27,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:27,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:27,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:27,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:27,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:27,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:27,973 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-22 00:27:27,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-22 00:27:28,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:28,174 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:27:28,175 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:27:28,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:28,309 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 00:27:28,310 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 30 treesize of output 25 [2022-11-22 00:27:28,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:28,452 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 00:27:28,452 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 40 treesize of output 30 [2022-11-22 00:27:29,139 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:27:30,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [189782547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:27:30,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:27:30,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 3, 3] total 12 [2022-11-22 00:27:30,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890205752] [2022-11-22 00:27:30,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:27:30,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:27:30,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:27:30,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:27:30,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-22 00:27:30,700 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:31,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:27:31,349 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2022-11-22 00:27:31,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 00:27:31,350 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-22 00:27:31,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:27:31,351 INFO L225 Difference]: With dead ends: 38 [2022-11-22 00:27:31,351 INFO L226 Difference]: Without dead ends: 24 [2022-11-22 00:27:31,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-11-22 00:27:31,353 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:27:31,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:27:31,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-22 00:27:31,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-11-22 00:27:31,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2022-11-22 00:27:31,364 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 15 [2022-11-22 00:27:31,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:27:31,365 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2022-11-22 00:27:31,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:31,365 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2022-11-22 00:27:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 00:27:31,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:27:31,366 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:27:31,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-22 00:27:31,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:31,572 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:27:31,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:27:31,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1119880071, now seen corresponding path program 1 times [2022-11-22 00:27:31,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:27:31,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012139939] [2022-11-22 00:27:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:31,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:27:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:27:31,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:27:31,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012139939] [2022-11-22 00:27:31,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012139939] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:27:31,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688313258] [2022-11-22 00:27:31,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:31,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:31,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:27:31,776 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:27:31,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:27:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:31,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 00:27:31,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:27:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:27:31,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:27:31,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:27:31,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688313258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:27:31,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1808907499] [2022-11-22 00:27:31,936 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 00:27:31,937 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:27:31,937 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:27:31,937 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:27:31,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:27:31,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:31,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:32,022 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-22 00:27:32,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-22 00:27:32,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:32,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:32,124 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 00:27:32,124 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 [2022-11-22 00:27:32,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:32,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:32,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-22 00:27:32,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:32,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:32,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:32,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:32,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:32,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:32,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:32,344 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-22 00:27:32,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-22 00:27:32,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:32,445 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:27:32,446 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:27:32,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:32,520 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 00:27:32,521 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 30 treesize of output 25 [2022-11-22 00:27:32,711 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:27:32,712 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 28 treesize of output 27 [2022-11-22 00:27:33,091 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:27:33,092 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 28 treesize of output 27 [2022-11-22 00:27:33,257 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:27:33,258 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 28 treesize of output 27 [2022-11-22 00:27:33,464 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:27:34,551 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '551#(and (not (< (+ |ULTIMATE.start_main_~pos~0#1| 1) ~SIZE~0)) (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:27:34,551 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:27:34,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:27:34,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-11-22 00:27:34,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624837353] [2022-11-22 00:27:34,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:27:34,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 00:27:34,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:27:34,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 00:27:34,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-11-22 00:27:34,553 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:34,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:27:34,795 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2022-11-22 00:27:34,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 00:27:34,795 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-22 00:27:34,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:27:34,796 INFO L225 Difference]: With dead ends: 84 [2022-11-22 00:27:34,796 INFO L226 Difference]: Without dead ends: 65 [2022-11-22 00:27:34,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-11-22 00:27:34,798 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 97 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:27:34,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 37 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:27:34,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-22 00:27:34,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 30. [2022-11-22 00:27:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:34,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-11-22 00:27:34,813 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 19 [2022-11-22 00:27:34,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:27:34,814 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-11-22 00:27:34,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:34,814 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-11-22 00:27:34,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 00:27:34,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:27:34,815 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:27:34,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 00:27:35,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:35,021 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:27:35,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:27:35,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1902894455, now seen corresponding path program 2 times [2022-11-22 00:27:35,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:27:35,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336824399] [2022-11-22 00:27:35,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:35,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:27:35,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:27:35,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:27:35,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336824399] [2022-11-22 00:27:35,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336824399] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:27:35,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648475992] [2022-11-22 00:27:35,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:27:35,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:35,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:27:35,171 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:27:35,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:27:35,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 00:27:35,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:27:35,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 00:27:35,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:27:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 00:27:35,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:27:35,577 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-22 00:27:35,577 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 15 treesize of output 9 [2022-11-22 00:27:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 00:27:35,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648475992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:27:35,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1070477359] [2022-11-22 00:27:35,601 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 00:27:35,602 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:27:35,602 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:27:35,603 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:27:35,603 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:27:35,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:35,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:35,683 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-22 00:27:35,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-22 00:27:35,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:35,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:35,771 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 00:27:35,771 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 [2022-11-22 00:27:35,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:35,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:35,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-22 00:27:35,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:35,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:35,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:35,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:35,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:35,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:35,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:35,967 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-22 00:27:35,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-22 00:27:36,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:36,056 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:27:36,057 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:27:36,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:36,125 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 00:27:36,126 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 30 treesize of output 25 [2022-11-22 00:27:36,291 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:27:36,291 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 28 treesize of output 27 [2022-11-22 00:27:36,633 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:27:36,634 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 28 treesize of output 27 [2022-11-22 00:27:36,781 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:27:36,781 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 28 treesize of output 27 [2022-11-22 00:27:37,008 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:27:38,238 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '904#(and (not (< (+ |ULTIMATE.start_main_~pos~0#1| 1) ~SIZE~0)) (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:27:38,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:27:38,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:27:38,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2022-11-22 00:27:38,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605708953] [2022-11-22 00:27:38,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:27:38,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 00:27:38,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:27:38,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 00:27:38,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-11-22 00:27:38,241 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:38,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:27:38,682 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2022-11-22 00:27:38,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 00:27:38,684 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-22 00:27:38,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:27:38,684 INFO L225 Difference]: With dead ends: 71 [2022-11-22 00:27:38,685 INFO L226 Difference]: Without dead ends: 47 [2022-11-22 00:27:38,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=238, Invalid=1568, Unknown=0, NotChecked=0, Total=1806 [2022-11-22 00:27:38,686 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 56 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:27:38,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 57 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:27:38,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-22 00:27:38,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2022-11-22 00:27:38,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:38,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-11-22 00:27:38,699 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 23 [2022-11-22 00:27:38,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:27:38,700 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-11-22 00:27:38,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:38,700 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-11-22 00:27:38,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 00:27:38,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:27:38,701 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:27:38,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 00:27:38,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:38,902 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:27:38,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:27:38,903 INFO L85 PathProgramCache]: Analyzing trace with hash -346550703, now seen corresponding path program 1 times [2022-11-22 00:27:38,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:27:38,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759677642] [2022-11-22 00:27:38,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:38,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:27:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 00:27:39,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:27:39,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759677642] [2022-11-22 00:27:39,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759677642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:27:39,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826558029] [2022-11-22 00:27:39,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:39,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:39,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:27:39,091 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:27:39,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:27:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:39,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 00:27:39,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:27:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 00:27:39,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:27:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 00:27:39,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826558029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:27:39,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [582264634] [2022-11-22 00:27:39,402 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 00:27:39,402 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:27:39,402 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:27:39,403 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:27:39,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:27:39,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:39,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:39,493 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 00:27:39,494 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 [2022-11-22 00:27:39,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:39,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:39,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-22 00:27:39,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:39,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:39,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-22 00:27:39,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:39,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:39,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:39,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:39,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:39,707 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-22 00:27:39,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-22 00:27:40,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:40,058 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:27:40,058 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:27:40,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:40,121 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 00:27:40,122 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 40 treesize of output 30 [2022-11-22 00:27:40,258 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:27:40,258 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 28 treesize of output 27 [2022-11-22 00:27:40,554 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:27:40,554 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 28 treesize of output 27 [2022-11-22 00:27:40,682 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:27:40,683 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 28 treesize of output 27 [2022-11-22 00:27:40,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:27:40,911 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 95 treesize of output 88 [2022-11-22 00:27:40,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:27:41,011 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:27:42,015 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1279#(and (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:27:42,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:27:42,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:27:42,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-11-22 00:27:42,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382964015] [2022-11-22 00:27:42,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:27:42,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 00:27:42,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:27:42,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 00:27:42,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2022-11-22 00:27:42,017 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:42,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:27:42,143 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2022-11-22 00:27:42,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 00:27:42,143 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-22 00:27:42,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:27:42,144 INFO L225 Difference]: With dead ends: 71 [2022-11-22 00:27:42,144 INFO L226 Difference]: Without dead ends: 43 [2022-11-22 00:27:42,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2022-11-22 00:27:42,145 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:27:42,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 32 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:27:42,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-22 00:27:42,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-11-22 00:27:42,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:42,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2022-11-22 00:27:42,159 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 25 [2022-11-22 00:27:42,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:27:42,160 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2022-11-22 00:27:42,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:42,160 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2022-11-22 00:27:42,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-22 00:27:42,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:27:42,161 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:27:42,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 00:27:42,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:42,367 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:27:42,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:27:42,367 INFO L85 PathProgramCache]: Analyzing trace with hash -85398682, now seen corresponding path program 2 times [2022-11-22 00:27:42,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:27:42,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046833829] [2022-11-22 00:27:42,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:42,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:27:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 00:27:42,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:27:42,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046833829] [2022-11-22 00:27:42,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046833829] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:27:42,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992721572] [2022-11-22 00:27:42,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:27:42,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:42,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:27:42,815 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:27:42,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:27:42,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 00:27:42,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:27:42,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 00:27:42,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:27:43,011 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 38 treesize of output 22 [2022-11-22 00:27:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-22 00:27:43,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:27:43,200 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 42 treesize of output 26 [2022-11-22 00:27:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-22 00:27:43,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992721572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:27:43,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [753045966] [2022-11-22 00:27:43,278 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 00:27:43,278 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:27:43,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:27:43,279 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:27:43,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:27:43,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:43,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:43,367 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 00:27:43,367 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 [2022-11-22 00:27:43,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:43,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:43,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-22 00:27:43,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:43,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:43,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-22 00:27:43,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:43,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:43,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:43,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:43,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:43,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:43,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:43,546 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-22 00:27:43,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-22 00:27:43,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:43,638 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:27:43,638 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:27:43,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:43,697 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 00:27:43,697 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 30 treesize of output 25 [2022-11-22 00:27:43,837 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:27:43,838 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 28 treesize of output 27 [2022-11-22 00:27:44,112 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:27:44,112 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 28 treesize of output 27 [2022-11-22 00:27:44,233 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:27:44,234 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 28 treesize of output 27 [2022-11-22 00:27:44,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:27:44,424 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 95 treesize of output 88 [2022-11-22 00:27:44,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:27:44,518 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:27:45,751 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1698#(and (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:27:45,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:27:45,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:27:45,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 26 [2022-11-22 00:27:45,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869424619] [2022-11-22 00:27:45,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:27:45,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-22 00:27:45,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:27:45,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-22 00:27:45,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=1104, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 00:27:45,754 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:48,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:27:48,099 INFO L93 Difference]: Finished difference Result 387 states and 461 transitions. [2022-11-22 00:27:48,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-22 00:27:48,100 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-22 00:27:48,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:27:48,103 INFO L225 Difference]: With dead ends: 387 [2022-11-22 00:27:48,103 INFO L226 Difference]: Without dead ends: 359 [2022-11-22 00:27:48,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4015 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3042, Invalid=8300, Unknown=0, NotChecked=0, Total=11342 [2022-11-22 00:27:48,108 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 971 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:27:48,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [971 Valid, 143 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:27:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-11-22 00:27:48,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 73. [2022-11-22 00:27:48,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3333333333333333) internal successors, (96), 72 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:48,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2022-11-22 00:27:48,135 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 32 [2022-11-22 00:27:48,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:27:48,136 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2022-11-22 00:27:48,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:48,136 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2022-11-22 00:27:48,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-22 00:27:48,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:27:48,137 INFO L195 NwaCegarLoop]: trace histogram [16, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:27:48,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 00:27:48,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:48,343 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:27:48,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:27:48,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1069550116, now seen corresponding path program 3 times [2022-11-22 00:27:48,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:27:48,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19223552] [2022-11-22 00:27:48,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:48,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:27:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 00:27:48,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:27:48,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19223552] [2022-11-22 00:27:48,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19223552] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:27:48,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697098009] [2022-11-22 00:27:48,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:27:48,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:48,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:27:48,991 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:27:48,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 00:27:49,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:27:49,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:27:49,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 00:27:49,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:27:49,369 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2022-11-22 00:27:49,369 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 56 treesize of output 64 [2022-11-22 00:27:49,554 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2022-11-22 00:27:49,555 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 63 treesize of output 71 [2022-11-22 00:27:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-22 00:27:49,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:27:50,115 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 63 treesize of output 55 [2022-11-22 00:27:50,136 INFO L321 Elim1Store]: treesize reduction 5, result has 78.3 percent of original size [2022-11-22 00:27:50,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 396 treesize of output 301 [2022-11-22 00:27:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-22 00:27:50,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697098009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:27:50,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1958880558] [2022-11-22 00:27:50,211 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 00:27:50,211 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:27:50,211 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:27:50,212 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:27:50,212 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:27:50,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:50,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:50,297 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 00:27:50,297 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 [2022-11-22 00:27:50,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:50,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:50,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-22 00:27:50,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:50,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:50,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-22 00:27:50,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:50,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:50,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:50,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:50,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:50,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:50,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:50,486 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-22 00:27:50,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-22 00:27:50,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:50,595 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:27:50,596 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:27:50,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:50,664 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 00:27:50,666 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 30 treesize of output 25 [2022-11-22 00:27:50,808 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:27:50,808 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 28 treesize of output 27 [2022-11-22 00:27:51,113 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:27:51,114 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 28 treesize of output 27 [2022-11-22 00:27:51,227 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:27:51,228 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 28 treesize of output 27 [2022-11-22 00:27:51,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:27:51,366 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 95 treesize of output 88 [2022-11-22 00:27:51,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:27:51,458 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:27:52,829 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2785#(and (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:27:52,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:27:52,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:27:52,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 35 [2022-11-22 00:27:52,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490722502] [2022-11-22 00:27:52,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:27:52,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-22 00:27:52,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:27:52,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-22 00:27:52,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=1810, Unknown=0, NotChecked=0, Total=2162 [2022-11-22 00:27:52,832 INFO L87 Difference]: Start difference. First operand 73 states and 96 transitions. Second operand has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:55,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:27:55,658 INFO L93 Difference]: Finished difference Result 189 states and 238 transitions. [2022-11-22 00:27:55,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-22 00:27:55,658 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-22 00:27:55,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:27:55,660 INFO L225 Difference]: With dead ends: 189 [2022-11-22 00:27:55,660 INFO L226 Difference]: Without dead ends: 134 [2022-11-22 00:27:55,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=642, Invalid=4050, Unknown=0, NotChecked=0, Total=4692 [2022-11-22 00:27:55,663 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 133 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:27:55,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 167 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 00:27:55,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-22 00:27:55,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 92. [2022-11-22 00:27:55,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2747252747252746) internal successors, (116), 91 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:55,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2022-11-22 00:27:55,701 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 38 [2022-11-22 00:27:55,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:27:55,701 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2022-11-22 00:27:55,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:55,701 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2022-11-22 00:27:55,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-22 00:27:55,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:27:55,703 INFO L195 NwaCegarLoop]: trace histogram [17, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:27:55,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 00:27:55,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-22 00:27:55,909 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:27:55,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:27:55,909 INFO L85 PathProgramCache]: Analyzing trace with hash -873479051, now seen corresponding path program 1 times [2022-11-22 00:27:55,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:27:55,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686247692] [2022-11-22 00:27:55,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:55,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:27:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 00:27:56,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:27:56,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686247692] [2022-11-22 00:27:56,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686247692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:27:56,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183333494] [2022-11-22 00:27:56,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:56,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:56,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:27:56,566 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:27:56,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 00:27:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:56,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 00:27:56,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:27:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 00:27:57,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:27:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 00:27:57,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183333494] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:27:57,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [10732393] [2022-11-22 00:27:57,588 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 00:27:57,589 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:27:57,589 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:27:57,589 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:27:57,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:27:57,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:57,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:57,679 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 00:27:57,679 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 [2022-11-22 00:27:57,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:57,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:57,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-22 00:27:57,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:57,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:57,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-22 00:27:57,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:57,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:27:57,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:57,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:57,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:57,883 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-22 00:27:57,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-22 00:27:58,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:58,217 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:27:58,218 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:27:58,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:27:58,280 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 00:27:58,280 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 30 treesize of output 25 [2022-11-22 00:27:58,403 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:27:58,404 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 28 treesize of output 27 [2022-11-22 00:27:58,653 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:27:58,654 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 28 treesize of output 27 [2022-11-22 00:27:58,812 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:27:58,812 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 28 treesize of output 27 [2022-11-22 00:27:58,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:27:59,015 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 95 treesize of output 88 [2022-11-22 00:27:59,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:27:59,259 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:28:00,729 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3636#(and (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:28:00,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:28:00,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:28:00,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2022-11-22 00:28:00,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002401076] [2022-11-22 00:28:00,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:28:00,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-22 00:28:00,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:28:00,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-22 00:28:00,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=3236, Unknown=0, NotChecked=0, Total=4692 [2022-11-22 00:28:00,733 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand has 56 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 55 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:28:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:28:00,917 INFO L93 Difference]: Finished difference Result 188 states and 254 transitions. [2022-11-22 00:28:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-22 00:28:00,917 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 55 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-22 00:28:00,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:28:00,918 INFO L225 Difference]: With dead ends: 188 [2022-11-22 00:28:00,918 INFO L226 Difference]: Without dead ends: 115 [2022-11-22 00:28:00,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1456, Invalid=3236, Unknown=0, NotChecked=0, Total=4692 [2022-11-22 00:28:00,921 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:28:00,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:28:00,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-22 00:28:00,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2022-11-22 00:28:00,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2272727272727273) internal successors, (135), 110 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:28:00,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 135 transitions. [2022-11-22 00:28:00,961 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 135 transitions. Word has length 42 [2022-11-22 00:28:00,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:28:00,961 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 135 transitions. [2022-11-22 00:28:00,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 55 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:28:00,962 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 135 transitions. [2022-11-22 00:28:00,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-22 00:28:00,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:28:00,963 INFO L195 NwaCegarLoop]: trace histogram [36, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:28:00,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 00:28:01,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:28:01,171 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:28:01,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:28:01,172 INFO L85 PathProgramCache]: Analyzing trace with hash -359713856, now seen corresponding path program 2 times [2022-11-22 00:28:01,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:28:01,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2437700] [2022-11-22 00:28:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:28:01,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:28:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 00:28:02,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:28:02,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2437700] [2022-11-22 00:28:02,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2437700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:28:02,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623016844] [2022-11-22 00:28:02,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:28:02,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:28:02,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:28:02,891 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:28:02,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 00:28:03,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 00:28:03,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:28:03,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 00:28:03,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:28:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2022-11-22 00:28:03,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:28:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2022-11-22 00:28:03,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623016844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:28:03,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [903280949] [2022-11-22 00:28:03,426 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 00:28:03,426 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:28:03,426 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:28:03,426 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:28:03,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:28:03,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:03,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:03,516 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 00:28:03,516 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 [2022-11-22 00:28:03,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:03,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:03,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-22 00:28:03,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:03,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:03,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-22 00:28:03,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:03,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:03,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:03,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:03,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:28:03,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:03,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:28:03,673 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-22 00:28:03,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-22 00:28:03,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:28:03,746 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:28:03,746 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:28:03,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:28:03,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:28:03,981 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-22 00:28:03,982 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 233 treesize of output 214 [2022-11-22 00:28:04,256 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:28:04,257 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 28 treesize of output 27 [2022-11-22 00:28:04,387 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:28:04,387 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 28 treesize of output 27 [2022-11-22 00:28:04,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:28:04,570 INFO L321 Elim1Store]: treesize reduction 71, result has 38.3 percent of original size [2022-11-22 00:28:04,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 124 [2022-11-22 00:28:04,651 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-22 00:28:04,653 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-22 00:28:04,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:28:04,869 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:28:06,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4612#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:28:06,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:28:06,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:28:06,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 5, 5] total 46 [2022-11-22 00:28:06,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534590357] [2022-11-22 00:28:06,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:28:06,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-22 00:28:06,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:28:06,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-22 00:28:06,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=856, Invalid=2684, Unknown=0, NotChecked=0, Total=3540 [2022-11-22 00:28:06,522 INFO L87 Difference]: Start difference. First operand 111 states and 135 transitions. Second operand has 47 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 46 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:28:08,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:28:08,317 INFO L93 Difference]: Finished difference Result 453 states and 538 transitions. [2022-11-22 00:28:08,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-22 00:28:08,318 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 46 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-22 00:28:08,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:28:08,320 INFO L225 Difference]: With dead ends: 453 [2022-11-22 00:28:08,320 INFO L226 Difference]: Without dead ends: 380 [2022-11-22 00:28:08,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2065 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2362, Invalid=7340, Unknown=0, NotChecked=0, Total=9702 [2022-11-22 00:28:08,324 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 936 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:28:08,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 159 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 00:28:08,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-11-22 00:28:08,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 140. [2022-11-22 00:28:08,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.2661870503597121) internal successors, (176), 139 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:28:08,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2022-11-22 00:28:08,374 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 61 [2022-11-22 00:28:08,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:28:08,374 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2022-11-22 00:28:08,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 46 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:28:08,375 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2022-11-22 00:28:08,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-22 00:28:08,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:28:08,376 INFO L195 NwaCegarLoop]: trace histogram [37, 6, 6, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:28:08,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 00:28:08,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 00:28:08,582 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:28:08,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:28:08,583 INFO L85 PathProgramCache]: Analyzing trace with hash 160443957, now seen corresponding path program 3 times [2022-11-22 00:28:08,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:28:08,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531634251] [2022-11-22 00:28:08,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:28:08,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:28:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-22 00:28:10,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:28:10,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531634251] [2022-11-22 00:28:10,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531634251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:28:10,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3956814] [2022-11-22 00:28:10,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:28:10,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:28:10,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:28:10,483 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:28:10,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 00:28:10,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:28:10,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:28:10,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-22 00:28:10,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:28:11,030 INFO L321 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2022-11-22 00:28:11,031 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 58 treesize of output 66 [2022-11-22 00:28:11,187 INFO L321 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2022-11-22 00:28:11,187 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 60 treesize of output 68 [2022-11-22 00:28:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2022-11-22 00:28:11,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:28:11,833 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 55 treesize of output 47 [2022-11-22 00:28:11,853 INFO L321 Elim1Store]: treesize reduction 5, result has 76.2 percent of original size [2022-11-22 00:28:11,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 77 [2022-11-22 00:28:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2022-11-22 00:28:11,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3956814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:28:11,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1741741130] [2022-11-22 00:28:11,909 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 00:28:11,909 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:28:11,909 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:28:11,910 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:28:11,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:28:11,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:11,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:11,994 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 00:28:11,995 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 [2022-11-22 00:28:12,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:12,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:12,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-22 00:28:12,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:12,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:12,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-22 00:28:12,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:12,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:12,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:28:12,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:28:12,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:28:12,212 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-22 00:28:12,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-22 00:28:12,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:28:12,496 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:28:12,497 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:28:12,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:28:12,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:28:12,667 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-22 00:28:12,667 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 233 treesize of output 214 [2022-11-22 00:28:13,012 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:28:13,012 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 28 treesize of output 27 [2022-11-22 00:28:13,151 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:28:13,151 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 28 treesize of output 27 [2022-11-22 00:28:13,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:28:13,286 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 95 treesize of output 88 [2022-11-22 00:28:13,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:28:13,481 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:28:15,241 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6155#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:28:15,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:28:15,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:28:15,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 12, 12] total 57 [2022-11-22 00:28:15,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286170968] [2022-11-22 00:28:15,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:28:15,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-22 00:28:15,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:28:15,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-22 00:28:15,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=915, Invalid=3915, Unknown=0, NotChecked=0, Total=4830 [2022-11-22 00:28:15,245 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand has 57 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 57 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:28:20,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:28:20,849 INFO L93 Difference]: Finished difference Result 284 states and 358 transitions. [2022-11-22 00:28:20,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-22 00:28:20,850 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 57 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-22 00:28:20,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:28:20,851 INFO L225 Difference]: With dead ends: 284 [2022-11-22 00:28:20,852 INFO L226 Difference]: Without dead ends: 183 [2022-11-22 00:28:20,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1884 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1234, Invalid=6956, Unknown=0, NotChecked=0, Total=8190 [2022-11-22 00:28:20,854 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 90 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:28:20,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 148 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 491 Invalid, 1 Unknown, 0 Unchecked, 1.4s Time] [2022-11-22 00:28:20,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-22 00:28:20,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 149. [2022-11-22 00:28:20,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.2567567567567568) internal successors, (186), 148 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:28:20,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 186 transitions. [2022-11-22 00:28:20,899 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 186 transitions. Word has length 74 [2022-11-22 00:28:20,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:28:20,899 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 186 transitions. [2022-11-22 00:28:20,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 57 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:28:20,899 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 186 transitions. [2022-11-22 00:28:20,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-22 00:28:20,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:28:20,901 INFO L195 NwaCegarLoop]: trace histogram [38, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:28:20,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 00:28:21,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 00:28:21,107 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:28:21,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:28:21,107 INFO L85 PathProgramCache]: Analyzing trace with hash -2012434249, now seen corresponding path program 4 times [2022-11-22 00:28:21,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:28:21,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671444967] [2022-11-22 00:28:21,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:28:21,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:28:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-22 00:28:23,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:28:23,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671444967] [2022-11-22 00:28:23,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671444967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:28:23,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416803913] [2022-11-22 00:28:23,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:28:23,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:28:23,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:28:23,015 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:28:23,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 00:28:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:23,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-22 00:28:23,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:28:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-22 00:28:24,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:28:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-22 00:28:26,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416803913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:28:26,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [110010752] [2022-11-22 00:28:26,557 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 00:28:26,557 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:28:26,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:28:26,558 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:28:26,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:28:26,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:26,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:26,641 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 00:28:26,641 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 [2022-11-22 00:28:26,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:26,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:26,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-22 00:28:26,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:26,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:26,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-22 00:28:26,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:26,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:26,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:26,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:26,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:28:26,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:26,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:28:26,810 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-22 00:28:26,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-22 00:28:26,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:28:26,888 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:28:26,888 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:28:27,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:28:27,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:28:27,052 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-22 00:28:27,053 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 233 treesize of output 214 [2022-11-22 00:28:27,387 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:28:27,387 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 28 treesize of output 27 [2022-11-22 00:28:27,515 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:28:27,515 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 28 treesize of output 27 [2022-11-22 00:28:27,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:28:27,708 INFO L321 Elim1Store]: treesize reduction 79, result has 31.3 percent of original size [2022-11-22 00:28:27,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 116 [2022-11-22 00:28:27,763 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-22 00:28:27,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:28:27,837 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:28:29,122 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7554#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:28:29,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:28:29,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:28:29,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 118 [2022-11-22 00:28:29,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160261453] [2022-11-22 00:28:29,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:28:29,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-11-22 00:28:29,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:28:29,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-11-22 00:28:29,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6713, Invalid=10317, Unknown=0, NotChecked=0, Total=17030 [2022-11-22 00:28:29,128 INFO L87 Difference]: Start difference. First operand 149 states and 186 transitions. Second operand has 119 states, 119 states have (on average 1.134453781512605) internal successors, (135), 118 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:28:29,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:28:29,453 INFO L93 Difference]: Finished difference Result 303 states and 416 transitions. [2022-11-22 00:28:29,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-22 00:28:29,454 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.134453781512605) internal successors, (135), 118 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-11-22 00:28:29,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:28:29,455 INFO L225 Difference]: With dead ends: 303 [2022-11-22 00:28:29,455 INFO L226 Difference]: Without dead ends: 194 [2022-11-22 00:28:29,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8429 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6713, Invalid=10317, Unknown=0, NotChecked=0, Total=17030 [2022-11-22 00:28:29,457 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:28:29,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 37 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:28:29,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-22 00:28:29,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 189. [2022-11-22 00:28:29,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.202127659574468) internal successors, (226), 188 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:28:29,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 226 transitions. [2022-11-22 00:28:29,534 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 226 transitions. Word has length 75 [2022-11-22 00:28:29,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:28:29,534 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 226 transitions. [2022-11-22 00:28:29,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.134453781512605) internal successors, (135), 118 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:28:29,535 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 226 transitions. [2022-11-22 00:28:29,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-22 00:28:29,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:28:29,536 INFO L195 NwaCegarLoop]: trace histogram [78, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:28:29,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 00:28:29,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 00:28:29,748 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:28:29,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:28:29,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1099479753, now seen corresponding path program 5 times [2022-11-22 00:28:29,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:28:29,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56160433] [2022-11-22 00:28:29,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:28:29,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:28:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3156 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-22 00:28:35,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:28:35,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56160433] [2022-11-22 00:28:35,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56160433] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:28:35,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295130683] [2022-11-22 00:28:35,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:28:35,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:28:35,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:28:35,646 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:28:35,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 00:28:35,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 00:28:35,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:28:35,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 00:28:35,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:28:36,685 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 00:28:36,686 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 24 treesize of output 29 [2022-11-22 00:28:36,770 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 00:28:36,770 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 28 treesize of output 33 [2022-11-22 00:28:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3156 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3142 trivial. 0 not checked. [2022-11-22 00:28:37,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:28:41,124 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 29 treesize of output 25 [2022-11-22 00:28:41,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:28:41,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 64 [2022-11-22 00:28:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3156 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3142 trivial. 0 not checked. [2022-11-22 00:28:41,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295130683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:28:41,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2048476761] [2022-11-22 00:28:41,622 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 00:28:41,623 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:28:41,623 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:28:41,623 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:28:41,623 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:28:41,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:41,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:41,699 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 00:28:41,700 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 [2022-11-22 00:28:41,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:41,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:41,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-22 00:28:41,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:41,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:41,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-22 00:28:41,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:41,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:41,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:41,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:41,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:28:41,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:28:41,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:28:41,867 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-22 00:28:41,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-22 00:28:41,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:28:41,951 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:28:41,951 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:28:42,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:28:42,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:28:42,146 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-22 00:28:42,147 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 233 treesize of output 214 [2022-11-22 00:28:42,636 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:28:42,637 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 28 treesize of output 27 [2022-11-22 00:28:42,879 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:28:42,879 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 28 treesize of output 27 [2022-11-22 00:28:43,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:28:43,061 INFO L321 Elim1Store]: treesize reduction 79, result has 31.3 percent of original size [2022-11-22 00:28:43,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 116 [2022-11-22 00:28:43,109 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-22 00:28:43,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:28:43,231 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:28:44,998 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9267#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:28:44,999 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:28:44,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:28:44,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 10, 10] total 98 [2022-11-22 00:28:44,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912695197] [2022-11-22 00:28:44,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:28:45,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-11-22 00:28:45,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:28:45,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-11-22 00:28:45,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3875, Invalid=8332, Unknown=3, NotChecked=0, Total=12210 [2022-11-22 00:28:45,008 INFO L87 Difference]: Start difference. First operand 189 states and 226 transitions. Second operand has 99 states, 99 states have (on average 1.3636363636363635) internal successors, (135), 98 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:29:16,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:29:16,416 INFO L93 Difference]: Finished difference Result 888 states and 1038 transitions. [2022-11-22 00:29:16,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 342 states. [2022-11-22 00:29:16,417 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.3636363636363635) internal successors, (135), 98 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-11-22 00:29:16,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:29:16,420 INFO L225 Difference]: With dead ends: 888 [2022-11-22 00:29:16,420 INFO L226 Difference]: Without dead ends: 779 [2022-11-22 00:29:16,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 757 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 443 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65036 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=40857, Invalid=156717, Unknown=6, NotChecked=0, Total=197580 [2022-11-22 00:29:16,438 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3192 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 1498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3192 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1498 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:29:16,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3192 Valid, 314 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1498 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-22 00:29:16,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-11-22 00:29:16,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 196. [2022-11-22 00:29:16,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.2153846153846153) internal successors, (237), 195 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:29:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 237 transitions. [2022-11-22 00:29:16,518 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 237 transitions. Word has length 115 [2022-11-22 00:29:16,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:29:16,518 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 237 transitions. [2022-11-22 00:29:16,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.3636363636363635) internal successors, (135), 98 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:29:16,519 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 237 transitions. [2022-11-22 00:29:16,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-22 00:29:16,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:29:16,520 INFO L195 NwaCegarLoop]: trace histogram [79, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:29:16,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-22 00:29:16,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 00:29:16,726 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:29:16,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:29:16,726 INFO L85 PathProgramCache]: Analyzing trace with hash 777524853, now seen corresponding path program 4 times [2022-11-22 00:29:16,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:29:16,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387911383] [2022-11-22 00:29:16,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:29:16,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:29:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:29:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3231 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-22 00:29:22,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:29:22,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387911383] [2022-11-22 00:29:22,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387911383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:29:22,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387637679] [2022-11-22 00:29:22,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:29:22,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:29:22,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:29:22,214 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:29:22,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 00:29:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:29:22,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 1675 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-22 00:29:22,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:29:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3231 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-22 00:29:26,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:29:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3231 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-22 00:29:35,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387637679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:29:35,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1063018818] [2022-11-22 00:29:35,240 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 00:29:35,240 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:29:35,240 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:29:35,240 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:29:35,240 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:29:35,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:29:35,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:29:35,315 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-22 00:29:35,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-22 00:29:35,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:29:35,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:29:35,402 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 00:29:35,402 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 [2022-11-22 00:29:35,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:29:35,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:29:35,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-22 00:29:35,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:29:35,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:29:35,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:29:35,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:29:35,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:29:35,598 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-22 00:29:35,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-22 00:29:35,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:29:35,892 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:29:35,892 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:29:36,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:29:36,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:29:36,052 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-22 00:29:36,053 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 233 treesize of output 214 [2022-11-22 00:29:36,345 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:29:36,345 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 28 treesize of output 27 [2022-11-22 00:29:36,452 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:29:36,453 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 28 treesize of output 27 [2022-11-22 00:29:36,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:29:36,577 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 95 treesize of output 88 [2022-11-22 00:29:36,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:29:36,822 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:29:38,855 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12574#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:29:38,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:29:38,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:29:38,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 241 [2022-11-22 00:29:38,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794273578] [2022-11-22 00:29:38,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:29:38,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 242 states [2022-11-22 00:29:38,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:29:38,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 242 interpolants. [2022-11-22 00:29:38,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26129, Invalid=38641, Unknown=0, NotChecked=0, Total=64770 [2022-11-22 00:29:38,865 INFO L87 Difference]: Start difference. First operand 196 states and 237 transitions. Second operand has 242 states, 242 states have (on average 1.0743801652892562) internal successors, (260), 241 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:29:39,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:29:39,513 INFO L93 Difference]: Finished difference Result 396 states and 558 transitions. [2022-11-22 00:29:39,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-11-22 00:29:39,514 INFO L78 Accepts]: Start accepts. Automaton has has 242 states, 242 states have (on average 1.0743801652892562) internal successors, (260), 241 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2022-11-22 00:29:39,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:29:39,515 INFO L225 Difference]: With dead ends: 396 [2022-11-22 00:29:39,515 INFO L226 Difference]: Without dead ends: 281 [2022-11-22 00:29:39,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30564 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=26129, Invalid=38641, Unknown=0, NotChecked=0, Total=64770 [2022-11-22 00:29:39,521 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:29:39,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 33 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:29:39,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-11-22 00:29:39,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 277. [2022-11-22 00:29:39,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.1521739130434783) internal successors, (318), 276 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:29:39,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 318 transitions. [2022-11-22 00:29:39,624 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 318 transitions. Word has length 118 [2022-11-22 00:29:39,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:29:39,624 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 318 transitions. [2022-11-22 00:29:39,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 242 states, 242 states have (on average 1.0743801652892562) internal successors, (260), 241 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:29:39,625 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 318 transitions. [2022-11-22 00:29:39,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-22 00:29:39,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:29:39,627 INFO L195 NwaCegarLoop]: trace histogram [160, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:29:39,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 00:29:39,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 00:29:39,836 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:29:39,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:29:39,836 INFO L85 PathProgramCache]: Analyzing trace with hash 168583840, now seen corresponding path program 5 times [2022-11-22 00:29:39,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:29:39,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403083263] [2022-11-22 00:29:39,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:29:39,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:29:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:29:59,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12951 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-22 00:29:59,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:29:59,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403083263] [2022-11-22 00:29:59,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403083263] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:29:59,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052035833] [2022-11-22 00:29:59,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:29:59,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:29:59,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:29:59,712 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:29:59,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 00:30:00,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 00:30:00,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:30:00,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 00:30:00,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:30:00,847 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 38 treesize of output 22 [2022-11-22 00:30:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12951 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12933 trivial. 0 not checked. [2022-11-22 00:30:01,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:30:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12951 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12933 trivial. 0 not checked. [2022-11-22 00:30:03,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052035833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:30:03,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1739734623] [2022-11-22 00:30:03,014 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 00:30:03,015 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:30:03,015 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:30:03,015 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:30:03,015 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:30:03,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:30:03,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:30:03,083 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-22 00:30:03,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-22 00:30:03,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:30:03,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:30:03,160 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 00:30:03,160 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 [2022-11-22 00:30:03,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:30:03,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:30:03,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-22 00:30:03,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:30:03,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:30:03,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:30:03,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:30:03,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:30:03,324 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-22 00:30:03,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-22 00:30:03,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:30:03,605 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:30:03,605 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:30:03,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:30:03,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:30:03,757 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-22 00:30:03,758 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 233 treesize of output 214 [2022-11-22 00:30:04,022 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:30:04,022 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 28 treesize of output 27 [2022-11-22 00:30:04,143 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 00:30:04,144 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 28 treesize of output 27 [2022-11-22 00:30:04,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:30:04,304 INFO L321 Elim1Store]: treesize reduction 79, result has 31.3 percent of original size [2022-11-22 00:30:04,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 116 [2022-11-22 00:30:04,342 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-22 00:30:04,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:30:04,499 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:30:07,859 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15239#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:30:07,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:30:07,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:30:07,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [162, 12, 12] total 183 [2022-11-22 00:30:07,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40609146] [2022-11-22 00:30:07,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:30:07,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 184 states [2022-11-22 00:30:07,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:30:07,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2022-11-22 00:30:07,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15586, Invalid=23026, Unknown=0, NotChecked=0, Total=38612 [2022-11-22 00:30:07,868 INFO L87 Difference]: Start difference. First operand 277 states and 318 transitions. Second operand has 184 states, 184 states have (on average 1.184782608695652) internal successors, (218), 183 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:11,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:11,266 INFO L93 Difference]: Finished difference Result 3723 states and 4441 transitions. [2022-11-22 00:33:11,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 677 states. [2022-11-22 00:33:11,267 INFO L78 Accepts]: Start accepts. Automaton has has 184 states, 184 states have (on average 1.184782608695652) internal successors, (218), 183 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2022-11-22 00:33:11,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:11,277 INFO L225 Difference]: With dead ends: 3723 [2022-11-22 00:33:11,277 INFO L226 Difference]: Without dead ends: 3605 [2022-11-22 00:33:11,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1425 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 863 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243259 ImplicationChecksByTransitivity, 134.1s TimeCoverageRelationStatistics Valid=218746, Invalid=528614, Unknown=0, NotChecked=0, Total=747360 [2022-11-22 00:33:11,317 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 11834 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 4080 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11834 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 5564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4080 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:11,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11834 Valid, 1072 Invalid, 5564 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4080 Valid, 1484 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-22 00:33:11,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2022-11-22 00:33:12,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 894. [2022-11-22 00:33:12,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 1.2161254199328106) internal successors, (1086), 893 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:12,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1086 transitions. [2022-11-22 00:33:12,004 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1086 transitions. Word has length 199 [2022-11-22 00:33:12,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:12,005 INFO L495 AbstractCegarLoop]: Abstraction has 894 states and 1086 transitions. [2022-11-22 00:33:12,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 184 states, 184 states have (on average 1.184782608695652) internal successors, (218), 183 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:12,006 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1086 transitions. [2022-11-22 00:33:12,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-11-22 00:33:12,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:12,008 INFO L195 NwaCegarLoop]: trace histogram [166, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:12,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:12,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 00:33:12,215 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:33:12,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:12,216 INFO L85 PathProgramCache]: Analyzing trace with hash -950521658, now seen corresponding path program 6 times [2022-11-22 00:33:12,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:33:12,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160049307] [2022-11-22 00:33:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:12,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:33:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13948 backedges. 0 proven. 13861 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-22 00:33:33,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:33:33,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160049307] [2022-11-22 00:33:33,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160049307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:33:33,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376247193] [2022-11-22 00:33:33,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:33:33,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:33,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:33:33,581 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:33:33,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b64707-d366-4c97-a62b-26b44dcf7328/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 00:33:34,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:33:34,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:33:34,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-22 00:33:34,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:35,338 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:33:35,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 37 [2022-11-22 00:33:35,477 INFO L321 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2022-11-22 00:33:35,477 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 34 treesize of output 36 [2022-11-22 00:33:35,617 INFO L321 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2022-11-22 00:33:35,618 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 34 treesize of output 36 [2022-11-22 00:33:35,764 INFO L321 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2022-11-22 00:33:35,765 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 34 treesize of output 36 [2022-11-22 00:33:35,908 INFO L321 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2022-11-22 00:33:35,908 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 34 treesize of output 36 [2022-11-22 00:33:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13948 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 13912 trivial. 0 not checked. [2022-11-22 00:33:36,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:38:11,266 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 157 treesize of output 145 [2022-11-22 00:38:11,341 INFO L321 Elim1Store]: treesize reduction 10, result has 71.4 percent of original size [2022-11-22 00:38:11,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36929 treesize of output 26617