./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/avg10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/avg10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0 --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 431bc26901e3cf271c74e4f10a5bc241d4509dbbafd99aaf0126c46ffc8b7c33 --- 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-e04fb08 [2022-11-16 19:41:59,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:41:59,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:41:59,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:41:59,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:41:59,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:41:59,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:41:59,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:41:59,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:41:59,664 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:41:59,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:41:59,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:41:59,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:41:59,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:41:59,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:41:59,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:41:59,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:41:59,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:41:59,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:41:59,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:41:59,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:41:59,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:41:59,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:41:59,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:41:59,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:41:59,707 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:41:59,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:41:59,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:41:59,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:41:59,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:41:59,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:41:59,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:41:59,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:41:59,719 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:41:59,720 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:41:59,720 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:41:59,721 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:41:59,722 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:41:59,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:41:59,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:41:59,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:41:59,725 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 19:41:59,780 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:41:59,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:41:59,781 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:41:59,781 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:41:59,782 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:41:59,783 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:41:59,783 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:41:59,783 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:41:59,783 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:41:59,784 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:41:59,785 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:41:59,785 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:41:59,786 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:41:59,786 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:41:59,786 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:41:59,786 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:41:59,797 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:41:59,797 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:41:59,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:41:59,799 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:41:59,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:41:59,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:41:59,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:41:59,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:41:59,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:41:59,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:41:59,801 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:41:59,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:41:59,801 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:41:59,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:41:59,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:41:59,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:41:59,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:41:59,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:41:59,804 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:41:59,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:41:59,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:41:59,804 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:41:59,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:41:59,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:41:59,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:41:59,806 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_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 431bc26901e3cf271c74e4f10a5bc241d4509dbbafd99aaf0126c46ffc8b7c33 [2022-11-16 19:42:00,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:42:00,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:42:00,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:42:00,203 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:42:00,204 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:42:00,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/reducercommutativity/avg10-2.i [2022-11-16 19:42:00,286 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/data/69025afed/fb2af94d0dae40038fdd7673270d36fd/FLAG33ae3ca72 [2022-11-16 19:42:00,907 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:42:00,908 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/sv-benchmarks/c/reducercommutativity/avg10-2.i [2022-11-16 19:42:00,917 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/data/69025afed/fb2af94d0dae40038fdd7673270d36fd/FLAG33ae3ca72 [2022-11-16 19:42:01,250 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/data/69025afed/fb2af94d0dae40038fdd7673270d36fd [2022-11-16 19:42:01,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:42:01,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:42:01,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:42:01,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:42:01,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:42:01,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:42:01" (1/1) ... [2022-11-16 19:42:01,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34b43a76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:01, skipping insertion in model container [2022-11-16 19:42:01,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:42:01" (1/1) ... [2022-11-16 19:42:01,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:42:01,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:42:01,608 WARN L229 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_f379925f-4257-46cc-b623-309d417a2765/sv-benchmarks/c/reducercommutativity/avg10-2.i[1282,1295] [2022-11-16 19:42:01,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:42:01,625 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:42:01,664 WARN L229 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_f379925f-4257-46cc-b623-309d417a2765/sv-benchmarks/c/reducercommutativity/avg10-2.i[1282,1295] [2022-11-16 19:42:01,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:42:01,686 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:42:01,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:01 WrapperNode [2022-11-16 19:42:01,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:42:01,688 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:42:01,688 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:42:01,689 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:42:01,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:01" (1/1) ... [2022-11-16 19:42:01,718 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:01" (1/1) ... [2022-11-16 19:42:01,749 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-11-16 19:42:01,749 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:42:01,751 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:42:01,751 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:42:01,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:42:01,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:01" (1/1) ... [2022-11-16 19:42:01,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:01" (1/1) ... [2022-11-16 19:42:01,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:01" (1/1) ... [2022-11-16 19:42:01,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:01" (1/1) ... [2022-11-16 19:42:01,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:01" (1/1) ... [2022-11-16 19:42:01,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:01" (1/1) ... [2022-11-16 19:42:01,802 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:01" (1/1) ... [2022-11-16 19:42:01,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:01" (1/1) ... [2022-11-16 19:42:01,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:42:01,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:42:01,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:42:01,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:42:01,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:01" (1/1) ... [2022-11-16 19:42:01,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:42:01,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:42:01,860 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:42:01,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:42:01,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:42:01,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:42:01,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 19:42:01,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 19:42:01,918 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2022-11-16 19:42:01,918 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2022-11-16 19:42:01,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:42:01,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:42:01,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 19:42:01,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 19:42:02,029 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:42:02,031 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:42:02,301 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:42:02,378 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:42:02,378 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 19:42:02,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:42:02 BoogieIcfgContainer [2022-11-16 19:42:02,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:42:02,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:42:02,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:42:02,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:42:02,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:42:01" (1/3) ... [2022-11-16 19:42:02,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d75cd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:42:02, skipping insertion in model container [2022-11-16 19:42:02,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:01" (2/3) ... [2022-11-16 19:42:02,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d75cd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:42:02, skipping insertion in model container [2022-11-16 19:42:02,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:42:02" (3/3) ... [2022-11-16 19:42:02,394 INFO L112 eAbstractionObserver]: Analyzing ICFG avg10-2.i [2022-11-16 19:42:02,417 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:42:02,417 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 19:42:02,476 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:42:02,484 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;@5eb1af0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:42:02,485 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 19:42:02,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:42:02,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:42:02,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:42:02,502 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:42:02,503 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:42:02,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:42:02,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1847977284, now seen corresponding path program 1 times [2022-11-16 19:42:02,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:42:02,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210200043] [2022-11-16 19:42:02,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:02,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:42:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 19:42:03,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:42:03,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210200043] [2022-11-16 19:42:03,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210200043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:42:03,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:42:03,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:42:03,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17553655] [2022-11-16 19:42:03,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:42:03,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:42:03,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:42:03,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:42:03,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:42:03,085 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 19:42:03,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:42:03,142 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-11-16 19:42:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:42:03,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2022-11-16 19:42:03,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:42:03,154 INFO L225 Difference]: With dead ends: 33 [2022-11-16 19:42:03,154 INFO L226 Difference]: Without dead ends: 16 [2022-11-16 19:42:03,158 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 [2022-11-16 19:42:03,163 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:42:03,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:42:03,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-16 19:42:03,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-16 19:42:03,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:42:03,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-16 19:42:03,209 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2022-11-16 19:42:03,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:42:03,209 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-16 19:42:03,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 19:42:03,210 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-16 19:42:03,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 19:42:03,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:42:03,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:42:03,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:42:03,213 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:42:03,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:42:03,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1923649121, now seen corresponding path program 1 times [2022-11-16 19:42:03,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:42:03,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455658789] [2022-11-16 19:42:03,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:03,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:42:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 19:42:03,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:42:03,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455658789] [2022-11-16 19:42:03,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455658789] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:42:03,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731819004] [2022-11-16 19:42:03,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:03,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:42:03,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:42:03,491 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:42:03,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:42:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:03,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:42:03,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:42:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 19:42:03,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:42:03,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731819004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:42:03,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:42:03,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-16 19:42:03,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261887213] [2022-11-16 19:42:03,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:42:03,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:42:03,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:42:03,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:42:03,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:42:03,720 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 19:42:03,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:42:03,770 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-11-16 19:42:03,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:42:03,780 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-11-16 19:42:03,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:42:03,781 INFO L225 Difference]: With dead ends: 29 [2022-11-16 19:42:03,781 INFO L226 Difference]: Without dead ends: 17 [2022-11-16 19:42:03,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:42:03,783 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:42:03,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:42:03,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-16 19:42:03,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-16 19:42:03,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:42:03,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-16 19:42:03,790 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2022-11-16 19:42:03,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:42:03,790 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-16 19:42:03,791 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 19:42:03,791 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-16 19:42:03,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 19:42:03,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:42:03,792 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:42:03,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 19:42:04,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-16 19:42:04,004 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:42:04,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:42:04,008 INFO L85 PathProgramCache]: Analyzing trace with hash -55252021, now seen corresponding path program 1 times [2022-11-16 19:42:04,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:42:04,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476207758] [2022-11-16 19:42:04,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:04,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:42:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 19:42:04,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:42:04,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476207758] [2022-11-16 19:42:04,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476207758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:42:04,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262609761] [2022-11-16 19:42:04,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:04,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:42:04,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:42:04,216 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:42:04,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 19:42:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:04,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:42:04,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:42:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:42:04,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:42:04,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262609761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:42:04,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:42:04,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-16 19:42:04,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434898490] [2022-11-16 19:42:04,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:42:04,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:42:04,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:42:04,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:42:04,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:42:04,352 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 19:42:04,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:42:04,377 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-11-16 19:42:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:42:04,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-16 19:42:04,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:42:04,379 INFO L225 Difference]: With dead ends: 27 [2022-11-16 19:42:04,379 INFO L226 Difference]: Without dead ends: 18 [2022-11-16 19:42:04,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:42:04,381 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:42:04,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:42:04,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-16 19:42:04,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-16 19:42:04,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:42:04,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-11-16 19:42:04,388 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2022-11-16 19:42:04,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:42:04,390 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-11-16 19:42:04,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 19:42:04,390 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-11-16 19:42:04,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 19:42:04,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:42:04,391 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:42:04,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 19:42:04,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:42:04,599 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:42:04,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:42:04,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1228256621, now seen corresponding path program 1 times [2022-11-16 19:42:04,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:42:04,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2561163] [2022-11-16 19:42:04,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:04,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:42:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 19:42:04,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:42:04,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2561163] [2022-11-16 19:42:04,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2561163] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:42:04,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555997969] [2022-11-16 19:42:04,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:04,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:42:04,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:42:04,749 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:42:04,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 19:42:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:04,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:42:04,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:42:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 19:42:04,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:42:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 19:42:05,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555997969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:42:05,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [463238934] [2022-11-16 19:42:05,053 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:42:05,053 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:42:05,057 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:42:05,065 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:42:05,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:42:05,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:05,278 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 19:42:05,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-16 19:42:05,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:05,332 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 19:42:05,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 19:42:05,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:05,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:42:05,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:05,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:42:05,573 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:42:05,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-16 19:42:05,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:42:05,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:05,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-16 19:42:06,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:06,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-16 19:42:06,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:06,281 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-16 19:42:06,282 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 3 case distinctions, treesize of input 72 treesize of output 80 [2022-11-16 19:42:06,383 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 [2022-11-16 19:42:06,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:42:06,625 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2022-11-16 19:42:06,686 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:42:52,323 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524#(and (<= 9 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_avg_~ret~0_BEFORE_RETURN_5 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_5 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_5 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_5 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_5 10)) 4294967296) 2147483647) (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_5 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_5 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_5 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_5 10)) 4294967296) (+ (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_5 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_5 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_5 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_5 10)) 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 10 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 36 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:42:52,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:42:52,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:42:52,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2022-11-16 19:42:52,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77324546] [2022-11-16 19:42:52,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:42:52,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:42:52,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:42:52,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:42:52,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=287, Unknown=12, NotChecked=0, Total=380 [2022-11-16 19:42:52,327 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 19:42:52,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:42:52,374 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-16 19:42:52,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:42:52,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2022-11-16 19:42:52,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:42:52,376 INFO L225 Difference]: With dead ends: 36 [2022-11-16 19:42:52,376 INFO L226 Difference]: Without dead ends: 21 [2022-11-16 19:42:52,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 45.7s TimeCoverageRelationStatistics Valid=81, Invalid=287, Unknown=12, NotChecked=0, Total=380 [2022-11-16 19:42:52,378 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:42:52,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:42:52,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-16 19:42:52,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-16 19:42:52,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:42:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-16 19:42:52,385 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2022-11-16 19:42:52,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:42:52,385 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-16 19:42:52,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 19:42:52,386 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-16 19:42:52,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 19:42:52,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:42:52,387 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:42:52,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 19:42:52,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:42:52,595 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:42:52,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:42:52,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2048081288, now seen corresponding path program 2 times [2022-11-16 19:42:52,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:42:52,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995847164] [2022-11-16 19:42:52,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:52,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:42:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 19:42:52,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:42:52,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995847164] [2022-11-16 19:42:52,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995847164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:42:52,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915045691] [2022-11-16 19:42:52,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:42:52,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:42:52,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:42:52,767 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:42:52,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 19:42:52,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:42:52,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:42:52,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:42:52,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:42:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 19:42:52,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:42:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 19:42:52,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915045691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:42:52,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [127720740] [2022-11-16 19:42:52,972 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:42:52,972 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:42:52,972 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:42:52,973 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:42:52,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:42:53,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:53,039 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 19:42:53,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 19:42:53,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:53,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-16 19:42:53,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:53,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:42:53,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:53,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:53,189 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:42:53,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-16 19:42:53,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:42:53,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:53,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-16 19:42:53,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:53,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:42:53,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-16 19:42:53,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:53,569 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-16 19:42:53,570 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 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-16 19:42:53,613 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 [2022-11-16 19:42:53,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:42:53,819 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2022-11-16 19:42:53,866 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:39,374 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= 9 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_avg_~ret~0_BEFORE_RETURN_12 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_12 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_12 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_12 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_12 10)) 4294967296) 2147483647) (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_12 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_12 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_12 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_12 10)) 4294967296) (+ (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_12 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_12 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_12 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_12 10)) 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 10 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 36 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:43:39,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:39,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:43:39,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-16 19:43:39,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951966623] [2022-11-16 19:43:39,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:39,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:43:39,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:39,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:43:39,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=287, Unknown=12, NotChecked=0, Total=380 [2022-11-16 19:43:39,378 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 19:43:39,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:39,421 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-11-16 19:43:39,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:43:39,422 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2022-11-16 19:43:39,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:39,423 INFO L225 Difference]: With dead ends: 38 [2022-11-16 19:43:39,423 INFO L226 Difference]: Without dead ends: 24 [2022-11-16 19:43:39,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 45.5s TimeCoverageRelationStatistics Valid=81, Invalid=287, Unknown=12, NotChecked=0, Total=380 [2022-11-16 19:43:39,425 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:39,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:43:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-16 19:43:39,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-16 19:43:39,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:43:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-16 19:43:39,431 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2022-11-16 19:43:39,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:39,432 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-16 19:43:39,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 19:43:39,432 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-16 19:43:39,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 19:43:39,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:39,434 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:43:39,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:39,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:39,640 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:43:39,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:39,641 INFO L85 PathProgramCache]: Analyzing trace with hash -174007092, now seen corresponding path program 3 times [2022-11-16 19:43:39,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:39,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116406366] [2022-11-16 19:43:39,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:39,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-16 19:43:39,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:39,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116406366] [2022-11-16 19:43:39,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116406366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:39,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664053854] [2022-11-16 19:43:39,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:43:39,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:39,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:39,791 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:39,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 19:43:39,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:43:39,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:43:39,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:43:39,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-16 19:43:39,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-16 19:43:40,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664053854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:40,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [413935545] [2022-11-16 19:43:40,088 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:43:40,089 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:40,089 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:40,089 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:40,090 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:40,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:40,140 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 19:43:40,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 19:43:40,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:40,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-16 19:43:40,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:40,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:43:40,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:40,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:40,250 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:43:40,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-16 19:43:40,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:43:40,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:40,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-16 19:43:40,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:40,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:43:40,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-16 19:43:40,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:40,553 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-16 19:43:40,554 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 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-16 19:43:40,582 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 [2022-11-16 19:43:40,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:43:40,762 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2022-11-16 19:43:40,801 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:44:23,078 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1141#(and (<= 9 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (exists ((v_avg_~ret~0_BEFORE_RETURN_17 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_17 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_17 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_17 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_17 10)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_17 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_17 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_17 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_17 10)) 4294967296) (+ (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_17 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_17 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_17 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_17 10)) 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 10 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 36 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:44:23,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:44:23,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:44:23,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-11-16 19:44:23,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244773148] [2022-11-16 19:44:23,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:44:23,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 19:44:23,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:44:23,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 19:44:23,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=560, Unknown=11, NotChecked=0, Total=702 [2022-11-16 19:44:23,081 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:44:23,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:44:23,156 INFO L93 Difference]: Finished difference Result 48 states and 64 transitions. [2022-11-16 19:44:23,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 19:44:23,157 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 37 [2022-11-16 19:44:23,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:44:23,158 INFO L225 Difference]: With dead ends: 48 [2022-11-16 19:44:23,158 INFO L226 Difference]: Without dead ends: 31 [2022-11-16 19:44:23,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 42.4s TimeCoverageRelationStatistics Valid=131, Invalid=560, Unknown=11, NotChecked=0, Total=702 [2022-11-16 19:44:23,162 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:44:23,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:44:23,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-16 19:44:23,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-16 19:44:23,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:44:23,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-16 19:44:23,180 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2022-11-16 19:44:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:44:23,180 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-16 19:44:23,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:44:23,181 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-16 19:44:23,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 19:44:23,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:44:23,185 INFO L195 NwaCegarLoop]: trace histogram [30, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:44:23,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 19:44:23,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 19:44:23,391 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:44:23,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:44:23,392 INFO L85 PathProgramCache]: Analyzing trace with hash 333155708, now seen corresponding path program 4 times [2022-11-16 19:44:23,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:44:23,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672108792] [2022-11-16 19:44:23,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:44:23,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:44:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:44:23,665 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-16 19:44:23,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:44:23,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672108792] [2022-11-16 19:44:23,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672108792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:44:23,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434903814] [2022-11-16 19:44:23,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:44:23,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:44:23,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:44:23,672 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:44:23,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 19:44:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:44:23,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:44:23,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:44:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-16 19:44:23,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:44:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-16 19:44:23,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434903814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:44:23,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1212926844] [2022-11-16 19:44:23,967 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:44:23,968 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:44:23,968 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:44:23,968 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:44:23,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:44:23,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:44:23,999 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 19:44:24,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-16 19:44:24,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:44:24,031 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 19:44:24,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 19:44:24,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:44:24,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 19:44:24,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:44:24,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:44:24,173 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-16 19:44:24,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-16 19:44:24,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:44:24,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:44:24,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-16 19:44:24,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:44:24,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:44:24,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-16 19:44:24,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:44:24,482 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-16 19:44:24,483 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 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-16 19:44:24,513 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 [2022-11-16 19:44:24,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:44:24,686 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2022-11-16 19:44:24,740 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:45:10,438 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1632#(and (<= 9 |ULTIMATE.start_main_~i~2#1|) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (exists ((v_avg_~ret~0_BEFORE_RETURN_24 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_24 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_24 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_24 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_24 10)) 4294967296) 2147483647) (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_24 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_24 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_24 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_24 10)) 4294967296) (+ (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_24 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_24 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_24 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_24 10)) 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (<= 10 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 36 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-16 19:45:10,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:45:10,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:45:10,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2022-11-16 19:45:10,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217468570] [2022-11-16 19:45:10,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:45:10,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 19:45:10,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:45:10,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 19:45:10,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=500, Unknown=12, NotChecked=0, Total=650 [2022-11-16 19:45:10,442 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 19:45:10,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:45:10,517 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2022-11-16 19:45:10,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 19:45:10,518 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 56 [2022-11-16 19:45:10,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:45:10,519 INFO L225 Difference]: With dead ends: 62 [2022-11-16 19:45:10,519 INFO L226 Difference]: Without dead ends: 37 [2022-11-16 19:45:10,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=138, Invalid=500, Unknown=12, NotChecked=0, Total=650 [2022-11-16 19:45:10,521 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:45:10,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:45:10,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-16 19:45:10,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-16 19:45:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:45:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-11-16 19:45:10,529 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 56 [2022-11-16 19:45:10,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:45:10,529 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-11-16 19:45:10,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 19:45:10,530 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-11-16 19:45:10,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 19:45:10,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:45:10,531 INFO L195 NwaCegarLoop]: trace histogram [30, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:45:10,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 19:45:10,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:45:10,738 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:45:10,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:45:10,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1095007396, now seen corresponding path program 5 times [2022-11-16 19:45:10,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:45:10,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135293081] [2022-11-16 19:45:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:45:10,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:45:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:45:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2022-11-16 19:45:10,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:45:10,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135293081] [2022-11-16 19:45:10,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135293081] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:45:10,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846446137] [2022-11-16 19:45:10,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:45:10,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:45:10,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:45:10,985 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:45:11,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 19:45:11,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 19:45:11,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:45:11,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 19:45:11,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:45:11,161 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-11-16 19:45:11,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:45:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2022-11-16 19:45:11,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846446137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:45:11,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [768255217] [2022-11-16 19:45:11,212 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:45:11,212 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:45:11,213 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:45:11,213 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:45:11,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:45:11,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:11,275 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 19:45:11,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-16 19:45:11,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:11,315 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 19:45:11,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 19:45:11,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:11,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:45:11,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:11,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:45:11,440 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:45:11,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-16 19:45:11,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:45:11,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:11,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-16 19:45:11,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:11,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-16 19:45:11,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:11,811 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-16 19:45:11,811 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 3 case distinctions, treesize of input 72 treesize of output 80 [2022-11-16 19:45:11,891 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 [2022-11-16 19:45:11,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:45:12,049 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2022-11-16 19:45:12,084 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:45:57,651 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2195#(and (<= 9 |ULTIMATE.start_main_~i~2#1|) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (exists ((v_avg_~ret~0_BEFORE_RETURN_30 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_30 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_30 0)) (+ 1 (div v_avg_~ret~0_BEFORE_RETURN_30 10)) (div v_avg_~ret~0_BEFORE_RETURN_30 10)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_30 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_30 0)) (+ 1 (div v_avg_~ret~0_BEFORE_RETURN_30 10)) (div v_avg_~ret~0_BEFORE_RETURN_30 10)) 4294967296) (+ (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_30 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_30 0)) (+ 1 (div v_avg_~ret~0_BEFORE_RETURN_30 10)) (div v_avg_~ret~0_BEFORE_RETURN_30 10)) 4294967296) (- 4294967296))))) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (<= 10 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 36 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-16 19:45:57,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:45:57,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:45:57,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-16 19:45:57,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804168844] [2022-11-16 19:45:57,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:45:57,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 19:45:57,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:45:57,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 19:45:57,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=354, Unknown=12, NotChecked=0, Total=462 [2022-11-16 19:45:57,653 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 19:45:57,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:45:57,696 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2022-11-16 19:45:57,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 19:45:57,697 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2022-11-16 19:45:57,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:45:57,698 INFO L225 Difference]: With dead ends: 59 [2022-11-16 19:45:57,698 INFO L226 Difference]: Without dead ends: 41 [2022-11-16 19:45:57,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=96, Invalid=354, Unknown=12, NotChecked=0, Total=462 [2022-11-16 19:45:57,700 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:45:57,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:45:57,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-16 19:45:57,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-16 19:45:57,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:45:57,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-11-16 19:45:57,707 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 62 [2022-11-16 19:45:57,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:45:57,708 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-11-16 19:45:57,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 19:45:57,709 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-11-16 19:45:57,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-16 19:45:57,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:45:57,710 INFO L195 NwaCegarLoop]: trace histogram [30, 10, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:45:57,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 19:45:57,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 19:45:57,911 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:45:57,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:45:57,912 INFO L85 PathProgramCache]: Analyzing trace with hash 967886684, now seen corresponding path program 6 times [2022-11-16 19:45:57,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:45:57,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348330968] [2022-11-16 19:45:57,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:45:57,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:45:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:45:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2022-11-16 19:45:58,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:45:58,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348330968] [2022-11-16 19:45:58,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348330968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:45:58,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559499324] [2022-11-16 19:45:58,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:45:58,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:45:58,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:45:58,297 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:45:58,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 19:45:58,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:45:58,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:45:58,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 19:45:58,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:45:58,554 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 246 proven. 21 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-11-16 19:45:58,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:45:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2022-11-16 19:45:58,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559499324] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:45:58,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [437062356] [2022-11-16 19:45:58,666 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:45:58,666 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:45:58,667 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:45:58,667 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:45:58,667 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:45:58,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:58,710 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 19:45:58,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 19:45:58,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:58,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-16 19:45:58,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:58,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:45:58,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:58,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:45:58,843 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:45:58,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-16 19:45:58,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:45:58,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:58,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-16 19:45:59,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:59,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:45:59,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-16 19:45:59,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:59,136 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-16 19:45:59,136 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 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-16 19:45:59,167 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 [2022-11-16 19:45:59,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:45:59,315 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2022-11-16 19:45:59,346 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:46:44,699 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2789#(and (<= 9 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((v_avg_~ret~0_BEFORE_RETURN_36 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_36 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_36 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_36 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_36 10)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_36 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_36 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_36 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_36 10)) 4294967296) (+ (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_36 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_36 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_36 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_36 10)) 4294967296) (- 4294967296))))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 10 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 36 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:46:44,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:46:44,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:46:44,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-11-16 19:46:44,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127421935] [2022-11-16 19:46:44,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:46:44,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 19:46:44,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:46:44,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 19:46:44,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=462, Unknown=12, NotChecked=0, Total=600 [2022-11-16 19:46:44,702 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 19:46:44,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:46:44,769 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2022-11-16 19:46:44,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 19:46:44,770 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 66 [2022-11-16 19:46:44,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:46:44,771 INFO L225 Difference]: With dead ends: 62 [2022-11-16 19:46:44,771 INFO L226 Difference]: Without dead ends: 44 [2022-11-16 19:46:44,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 177 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 45.5s TimeCoverageRelationStatistics Valid=126, Invalid=462, Unknown=12, NotChecked=0, Total=600 [2022-11-16 19:46:44,772 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:46:44,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:46:44,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-16 19:46:44,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-16 19:46:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:46:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-11-16 19:46:44,780 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 66 [2022-11-16 19:46:44,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:46:44,780 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-11-16 19:46:44,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 19:46:44,781 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-11-16 19:46:44,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 19:46:44,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:46:44,782 INFO L195 NwaCegarLoop]: trace histogram [30, 10, 9, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:46:44,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 19:46:44,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:46:44,991 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:46:44,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:46:44,991 INFO L85 PathProgramCache]: Analyzing trace with hash 631878764, now seen corresponding path program 7 times [2022-11-16 19:46:44,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:46:44,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779305507] [2022-11-16 19:46:44,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:46:44,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:46:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 1 proven. 618 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 19:48:27,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:48:27,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779305507] [2022-11-16 19:48:27,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779305507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:48:27,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913187761] [2022-11-16 19:48:27,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:48:27,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:48:27,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:48:27,083 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:48:27,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f379925f-4257-46cc-b623-309d417a2765/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 19:48:27,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:27,484 WARN L261 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 262 conjunts are in the unsatisfiable core [2022-11-16 19:48:27,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:29,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:48:38,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:38,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:38,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:38,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:38,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:38,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:38,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:38,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:38,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:38,109 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:48:38,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 2289 treesize of output 611 [2022-11-16 19:48:51,951 WARN L233 SmtUtils]: Spent 7.01s on a formula simplification that was a NOOP. DAG size: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:49:02,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:02,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:02,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:02,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:02,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:02,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:02,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:02,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:02,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:49:02,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:02,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:02,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:02,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:02,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:02,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:02,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:02,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:02,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:02,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:49:02,419 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-16 19:49:02,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 4556 treesize of output 1159 [2022-11-16 19:49:06,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:06,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:06,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:06,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:06,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:06,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:06,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:06,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:06,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:06,423 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:49:06,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 4317 treesize of output 1136 [2022-11-16 19:49:17,111 WARN L233 SmtUtils]: Spent 7.20s on a formula simplification that was a NOOP. DAG size: 105 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:49:17,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:17,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:17,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:17,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:17,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:17,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:17,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:17,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:17,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:17,345 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:49:17,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 4199 treesize of output 1136 [2022-11-16 19:49:20,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:49:20,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:49:20,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:20,628 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-16 19:49:20,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 4204 treesize of output 1159 [2022-11-16 19:49:25,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:49:25,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:49:25,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:25,762 INFO L321 Elim1Store]: treesize reduction 4, result has 42.9 percent of original size [2022-11-16 19:49:25,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 4207 treesize of output 1162 [2022-11-16 19:49:32,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:32,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:32,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:32,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:32,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:32,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:32,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:32,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:32,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:32,813 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:49:32,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 4199 treesize of output 1136 [2022-11-16 19:49:36,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:49:36,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:49:36,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:36,811 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-16 19:49:36,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 4204 treesize of output 1159 [2022-11-16 19:49:41,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:41,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:41,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:41,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:41,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:41,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:41,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:41,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:41,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:41,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:49:41,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 4199 treesize of output 1136 [2022-11-16 19:49:53,884 WARN L233 SmtUtils]: Spent 7.33s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:49:54,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:54,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:54,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:54,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:54,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:54,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:54,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:54,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:54,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:54,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:49:54,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 4199 treesize of output 1136 [2022-11-16 19:50:09,804 WARN L233 SmtUtils]: Spent 9.71s on a formula simplification that was a NOOP. DAG size: 102 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:50:10,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:10,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:10,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:10,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:10,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:10,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:10,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:10,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:10,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:10,065 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:50:10,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 4193 treesize of output 1136 [2022-11-16 19:50:19,848 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:50:19,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 5167 treesize of output 1567 [2022-11-16 19:50:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 19:50:23,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:51:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-16 19:51:31,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913187761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:51:31,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1714166731] [2022-11-16 19:51:31,827 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:51:31,827 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:51:31,828 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:51:31,828 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:51:31,828 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:51:31,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:51:31,857 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 19:51:31,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 19:51:31,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:51:31,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-16 19:51:31,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:51:31,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:51:31,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:51:31,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:51:31,950 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-16 19:51:31,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-16 19:51:32,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 19:51:32,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:51:32,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-16 19:51:32,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:51:32,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-16 19:51:32,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:51:32,236 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-16 19:51:32,237 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 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-16 19:51:32,298 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 [2022-11-16 19:51:32,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:51:32,427 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2022-11-16 19:51:32,454 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:52:24,957 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3520#(and (<= 9 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_avg_~ret~0_BEFORE_RETURN_42 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_42 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_42 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_42 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_42 10)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_42 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_42 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_42 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_42 10)) 4294967296) (+ (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_42 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_42 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_42 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_42 10)) 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 10 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 36 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:52:24,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:52:24,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:52:24,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 41, 31] total 119 [2022-11-16 19:52:24,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063810046] [2022-11-16 19:52:24,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:52:24,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-11-16 19:52:24,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:52:24,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-11-16 19:52:24,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=16789, Unknown=13, NotChecked=0, Total=17292 [2022-11-16 19:52:24,967 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 119 states, 108 states have (on average 1.1111111111111112) internal successors, (120), 110 states have internal predecessors, (120), 9 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 19:52:55,739 WARN L233 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 253 DAG size of output: 101 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:53:09,331 WARN L233 SmtUtils]: Spent 6.46s on a formula simplification. DAG size of input: 180 DAG size of output: 133 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:55:01,951 WARN L233 SmtUtils]: Spent 51.07s on a formula simplification. DAG size of input: 711 DAG size of output: 148 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)