./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a95a21aef2f50b6142b75e9167422e223cf73e944019da3877f24b8f537b25b5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 03:08:29,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 03:08:29,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 03:08:29,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 03:08:29,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 03:08:29,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 03:08:29,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 03:08:29,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 03:08:29,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 03:08:29,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 03:08:29,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 03:08:29,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 03:08:29,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 03:08:29,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 03:08:29,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 03:08:29,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 03:08:29,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 03:08:29,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 03:08:29,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 03:08:29,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 03:08:29,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 03:08:29,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 03:08:29,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 03:08:29,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 03:08:29,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 03:08:29,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 03:08:29,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 03:08:29,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 03:08:29,674 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 03:08:29,675 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 03:08:29,676 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 03:08:29,677 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 03:08:29,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 03:08:29,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 03:08:29,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 03:08:29,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 03:08:29,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 03:08:29,681 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 03:08:29,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 03:08:29,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 03:08:29,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 03:08:29,684 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 03:08:29,710 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 03:08:29,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 03:08:29,711 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 03:08:29,711 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 03:08:29,712 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 03:08:29,712 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 03:08:29,712 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 03:08:29,712 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 03:08:29,712 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 03:08:29,713 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 03:08:29,713 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 03:08:29,713 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 03:08:29,713 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 03:08:29,713 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 03:08:29,713 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 03:08:29,714 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 03:08:29,714 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 03:08:29,714 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 03:08:29,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 03:08:29,715 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 03:08:29,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 03:08:29,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 03:08:29,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 03:08:29,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 03:08:29,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 03:08:29,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 03:08:29,716 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 03:08:29,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 03:08:29,717 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 03:08:29,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 03:08:29,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 03:08:29,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 03:08:29,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:08:29,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 03:08:29,718 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 03:08:29,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 03:08:29,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 03:08:29,718 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 03:08:29,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 03:08:29,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 03:08:29,719 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 03:08:29,719 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_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a95a21aef2f50b6142b75e9167422e223cf73e944019da3877f24b8f537b25b5 [2022-12-14 03:08:29,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 03:08:29,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 03:08:29,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 03:08:29,941 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 03:08:29,941 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 03:08:29,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2022-12-14 03:08:32,553 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 03:08:32,708 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 03:08:32,708 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2022-12-14 03:08:32,713 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/data/84d34489b/7dafc313a8da442797e068626ecd34e0/FLAGcadfaedb4 [2022-12-14 03:08:33,113 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/data/84d34489b/7dafc313a8da442797e068626ecd34e0 [2022-12-14 03:08:33,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 03:08:33,117 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 03:08:33,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 03:08:33,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 03:08:33,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 03:08:33,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:08:33" (1/1) ... [2022-12-14 03:08:33,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1372f037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:33, skipping insertion in model container [2022-12-14 03:08:33,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:08:33" (1/1) ... [2022-12-14 03:08:33,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 03:08:33,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 03:08:33,256 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c[537,550] [2022-12-14 03:08:33,267 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:08:33,275 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 03:08:33,284 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c[537,550] [2022-12-14 03:08:33,289 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:08:33,299 INFO L208 MainTranslator]: Completed translation [2022-12-14 03:08:33,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:33 WrapperNode [2022-12-14 03:08:33,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 03:08:33,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 03:08:33,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 03:08:33,300 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 03:08:33,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:33" (1/1) ... [2022-12-14 03:08:33,311 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:33" (1/1) ... [2022-12-14 03:08:33,322 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-12-14 03:08:33,323 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 03:08:33,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 03:08:33,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 03:08:33,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 03:08:33,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:33" (1/1) ... [2022-12-14 03:08:33,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:33" (1/1) ... [2022-12-14 03:08:33,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:33" (1/1) ... [2022-12-14 03:08:33,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:33" (1/1) ... [2022-12-14 03:08:33,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:33" (1/1) ... [2022-12-14 03:08:33,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:33" (1/1) ... [2022-12-14 03:08:33,338 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:33" (1/1) ... [2022-12-14 03:08:33,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:33" (1/1) ... [2022-12-14 03:08:33,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 03:08:33,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 03:08:33,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 03:08:33,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 03:08:33,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:33" (1/1) ... [2022-12-14 03:08:33,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:08:33,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:33,364 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 03:08:33,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 03:08:33,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 03:08:33,399 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 03:08:33,399 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 03:08:33,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 03:08:33,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 03:08:33,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 03:08:33,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 03:08:33,400 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 03:08:33,450 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 03:08:33,452 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 03:08:33,558 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 03:08:33,598 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 03:08:33,598 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 03:08:33,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:08:33 BoogieIcfgContainer [2022-12-14 03:08:33,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 03:08:33,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 03:08:33,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 03:08:33,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 03:08:33,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:08:33" (1/3) ... [2022-12-14 03:08:33,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e1f4c82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:08:33, skipping insertion in model container [2022-12-14 03:08:33,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:33" (2/3) ... [2022-12-14 03:08:33,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e1f4c82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:08:33, skipping insertion in model container [2022-12-14 03:08:33,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:08:33" (3/3) ... [2022-12-14 03:08:33,609 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound20.c [2022-12-14 03:08:33,627 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 03:08:33,628 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 03:08:33,676 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 03:08:33,683 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;@5fb3966b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 03:08:33,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 03:08:33,687 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 03:08:33,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 03:08:33,694 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:33,695 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:08:33,695 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:33,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:33,701 INFO L85 PathProgramCache]: Analyzing trace with hash -419629030, now seen corresponding path program 1 times [2022-12-14 03:08:33,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:33,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335706545] [2022-12-14 03:08:33,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:33,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:33,808 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:08:33,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559024178] [2022-12-14 03:08:33,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:33,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:33,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:33,810 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:08:33,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 03:08:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:33,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 03:08:33,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:08:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 03:08:33,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:08:33,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:33,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335706545] [2022-12-14 03:08:33,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:08:33,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559024178] [2022-12-14 03:08:33,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559024178] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:08:33,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:08:33,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 03:08:33,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473136919] [2022-12-14 03:08:33,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:08:33,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 03:08:33,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:33,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 03:08:33,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:08:33,982 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 03:08:34,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:34,060 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2022-12-14 03:08:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 03:08:34,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2022-12-14 03:08:34,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:34,067 INFO L225 Difference]: With dead ends: 42 [2022-12-14 03:08:34,067 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 03:08:34,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:08:34,073 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:34,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 56 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:08:34,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 03:08:34,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-12-14 03:08:34,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 16 states have internal predecessors, (16), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 03:08:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-12-14 03:08:34,102 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2022-12-14 03:08:34,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:34,103 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-12-14 03:08:34,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 03:08:34,104 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-12-14 03:08:34,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 03:08:34,105 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:34,105 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:08:34,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 03:08:34,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 03:08:34,306 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:34,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:34,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1592245763, now seen corresponding path program 1 times [2022-12-14 03:08:34,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:34,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081284780] [2022-12-14 03:08:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:34,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:34,344 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:08:34,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496285254] [2022-12-14 03:08:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:34,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:34,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:34,348 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:08:34,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 03:08:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:34,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 03:08:34,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:08:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:08:34,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:08:34,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:34,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081284780] [2022-12-14 03:08:34,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:08:34,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496285254] [2022-12-14 03:08:34,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496285254] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:08:34,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:08:34,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 03:08:34,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543177305] [2022-12-14 03:08:34,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:08:34,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 03:08:34,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:34,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 03:08:34,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:08:34,490 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 03:08:34,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:34,528 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-12-14 03:08:34,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 03:08:34,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2022-12-14 03:08:34,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:34,529 INFO L225 Difference]: With dead ends: 32 [2022-12-14 03:08:34,530 INFO L226 Difference]: Without dead ends: 25 [2022-12-14 03:08:34,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:08:34,531 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:34,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 42 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:08:34,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-14 03:08:34,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-12-14 03:08:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 03:08:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-12-14 03:08:34,538 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2022-12-14 03:08:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:34,538 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-12-14 03:08:34,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 03:08:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-12-14 03:08:34,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 03:08:34,539 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:34,539 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:08:34,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 03:08:34,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:34,741 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:34,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:34,742 INFO L85 PathProgramCache]: Analyzing trace with hash -556494917, now seen corresponding path program 1 times [2022-12-14 03:08:34,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:34,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902699465] [2022-12-14 03:08:34,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:34,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:34,807 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:08:34,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257809581] [2022-12-14 03:08:34,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:34,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:34,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:34,813 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:08:34,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 03:08:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:34,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 03:08:34,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:08:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:08:35,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:08:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:08:41,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:41,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902699465] [2022-12-14 03:08:41,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:08:41,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257809581] [2022-12-14 03:08:41,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257809581] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:08:41,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [190557143] [2022-12-14 03:08:41,814 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 03:08:41,814 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:08:41,817 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:08:41,821 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:08:41,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:08:42,302 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2022-12-14 03:08:42,375 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 03:08:42,376 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:08:45,106 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '482#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:08:45,106 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:08:45,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:08:45,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-12-14 03:08:45,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126990203] [2022-12-14 03:08:45,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:08:45,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 03:08:45,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:45,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 03:08:45,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-12-14 03:08:45,109 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 03:08:52,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 03:08:52,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:52,228 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-12-14 03:08:52,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 03:08:52,229 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 24 [2022-12-14 03:08:52,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:52,231 INFO L225 Difference]: With dead ends: 40 [2022-12-14 03:08:52,231 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 03:08:52,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 03:08:52,232 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:52,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 68 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 03:08:52,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 03:08:52,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-12-14 03:08:52,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 03:08:52,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-12-14 03:08:52,239 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 24 [2022-12-14 03:08:52,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:52,239 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-12-14 03:08:52,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 03:08:52,239 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-12-14 03:08:52,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 03:08:52,240 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:52,240 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:08:52,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 03:08:52,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:52,441 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:52,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:52,443 INFO L85 PathProgramCache]: Analyzing trace with hash 762174686, now seen corresponding path program 1 times [2022-12-14 03:08:52,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:52,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422020511] [2022-12-14 03:08:52,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:52,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:52,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:08:52,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193211572] [2022-12-14 03:08:52,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:52,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:52,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:52,479 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:08:52,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 03:08:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:52,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 03:08:52,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:08:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 03:08:52,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:08:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 03:08:52,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:52,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422020511] [2022-12-14 03:08:52,642 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:08:52,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193211572] [2022-12-14 03:08:52,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193211572] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:08:52,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [796098569] [2022-12-14 03:08:52,644 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 03:08:52,644 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:08:52,644 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:08:52,644 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:08:52,644 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:08:53,088 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-12-14 03:08:53,092 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 03:08:53,093 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:08:53,630 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '802#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:08:53,630 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:08:53,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:08:53,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-12-14 03:08:53,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94070941] [2022-12-14 03:08:53,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:08:53,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 03:08:53,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:53,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 03:08:53,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-12-14 03:08:53,632 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 03:08:53,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:53,720 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-12-14 03:08:53,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 03:08:53,720 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 30 [2022-12-14 03:08:53,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:53,721 INFO L225 Difference]: With dead ends: 43 [2022-12-14 03:08:53,721 INFO L226 Difference]: Without dead ends: 36 [2022-12-14 03:08:53,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-12-14 03:08:53,722 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:53,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 64 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:08:53,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-14 03:08:53,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-12-14 03:08:53,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 03:08:53,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-12-14 03:08:53,728 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 30 [2022-12-14 03:08:53,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:53,728 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-12-14 03:08:53,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 03:08:53,729 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-12-14 03:08:53,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 03:08:53,730 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:53,730 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:08:53,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 03:08:53,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:53,932 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:53,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:53,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1596629466, now seen corresponding path program 2 times [2022-12-14 03:08:53,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:53,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379217300] [2022-12-14 03:08:53,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:53,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:53,946 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:08:53,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823379007] [2022-12-14 03:08:53,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:08:53,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:53,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:53,947 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:08:53,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 03:08:54,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 03:08:54,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:08:54,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 03:08:54,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:08:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 03:08:59,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:09:07,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:09:07,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379217300] [2022-12-14 03:09:07,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:09:07,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823379007] [2022-12-14 03:09:07,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823379007] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:09:07,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1634376245] [2022-12-14 03:09:07,302 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 03:09:07,302 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:09:07,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:09:07,303 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:09:07,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:09:07,620 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2022-12-14 03:09:07,762 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 03:09:07,763 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:09:11,298 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1130#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:09:11,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:09:11,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:09:11,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-12-14 03:09:11,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122202062] [2022-12-14 03:09:11,299 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 03:09:11,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 03:09:11,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:09:11,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 03:09:11,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 03:09:11,300 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 03:09:12,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:09:12,412 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-12-14 03:09:12,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 03:09:12,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 45 [2022-12-14 03:09:12,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:09:12,413 INFO L225 Difference]: With dead ends: 46 [2022-12-14 03:09:12,413 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 03:09:12,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 03:09:12,414 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:09:12,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 83 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 03:09:12,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 03:09:12,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-12-14 03:09:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 03:09:12,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-12-14 03:09:12,426 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 45 [2022-12-14 03:09:12,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:09:12,426 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-12-14 03:09:12,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 03:09:12,426 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-12-14 03:09:12,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 03:09:12,427 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:09:12,427 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:09:12,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 03:09:12,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:12,629 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:09:12,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:09:12,630 INFO L85 PathProgramCache]: Analyzing trace with hash -645370373, now seen corresponding path program 3 times [2022-12-14 03:09:12,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:09:12,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142741841] [2022-12-14 03:09:12,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:12,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:09:12,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:09:12,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096632589] [2022-12-14 03:09:12,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 03:09:12,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:12,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:09:12,673 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:09:12,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 03:09:16,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 03:09:16,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:09:16,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 72 conjunts are in the unsatisfiable core [2022-12-14 03:09:16,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:11:28,076 WARN L233 SmtUtils]: Spent 1.91m on a formula simplification. DAG size of input: 149 DAG size of output: 127 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 03:12:13,875 WARN L233 SmtUtils]: Spent 37.68s on a formula simplification that was a NOOP. DAG size: 116 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 03:15:18,503 WARN L233 SmtUtils]: Spent 2.61m on a formula simplification. DAG size of input: 210 DAG size of output: 206 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 03:15:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 03:15:38,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:16:02,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:02,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142741841] [2022-12-14 03:16:02,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:16:02,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096632589] [2022-12-14 03:16:02,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096632589] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:16:02,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [303965279] [2022-12-14 03:16:02,517 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 03:16:02,517 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:16:02,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:16:02,518 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:16:02,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:16:02,909 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2022-12-14 03:16:03,001 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 03:16:03,004 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:16:12,052 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1494#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 03:16:12,052 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:16:12,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:16:12,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-12-14 03:16:12,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844805136] [2022-12-14 03:16:12,053 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 03:16:12,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 03:16:12,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:12,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 03:16:12,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1086, Unknown=12, NotChecked=0, Total=1260 [2022-12-14 03:16:12,055 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-14 03:16:26,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 03:16:28,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 03:16:30,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 03:20:28,250 WARN L233 SmtUtils]: Spent 3.87m on a formula simplification. DAG size of input: 144 DAG size of output: 141 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 03:20:32,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 03:20:35,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 03:20:37,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 03:20:37,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:20:37,803 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-12-14 03:20:37,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 03:20:37,804 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 52 [2022-12-14 03:20:37,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:20:37,804 INFO L225 Difference]: With dead ends: 53 [2022-12-14 03:20:37,804 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 03:20:37,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 598.8s TimeCoverageRelationStatistics Valid=199, Invalid=1346, Unknown=15, NotChecked=0, Total=1560 [2022-12-14 03:20:37,806 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 13 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.3s IncrementalHoareTripleChecker+Time [2022-12-14 03:20:37,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 111 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 314 Invalid, 6 Unknown, 0 Unchecked, 22.3s Time] [2022-12-14 03:20:37,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 03:20:37,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-12-14 03:20:37,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 34 states have internal predecessors, (34), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 03:20:37,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-12-14 03:20:37,832 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 52 [2022-12-14 03:20:37,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:20:37,833 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-12-14 03:20:37,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-14 03:20:37,833 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-12-14 03:20:37,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 03:20:37,833 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:20:37,833 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:20:37,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 03:20:38,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:20:38,035 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:20:38,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:20:38,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1079241402, now seen corresponding path program 4 times [2022-12-14 03:20:38,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:20:38,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963809914] [2022-12-14 03:20:38,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:20:38,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:20:38,049 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:20:38,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038996896] [2022-12-14 03:20:38,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 03:20:38,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:20:38,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:20:38,051 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:20:38,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 03:20:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:20:38,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 03:20:38,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:20:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 26 proven. 60 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 03:20:52,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:21:13,277 WARN L233 SmtUtils]: Spent 8.44s on a formula simplification. DAG size of input: 180 DAG size of output: 156 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 03:21:34,477 WARN L233 SmtUtils]: Spent 9.28s on a formula simplification that was a NOOP. DAG size: 278 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 03:22:02,153 WARN L233 SmtUtils]: Spent 6.75s on a formula simplification that was a NOOP. DAG size: 278 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 03:22:17,937 WARN L233 SmtUtils]: Spent 10.42s on a formula simplification. DAG size of input: 115 DAG size of output: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 03:22:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 03:22:19,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:22:19,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963809914] [2022-12-14 03:22:19,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:22:19,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038996896] [2022-12-14 03:22:19,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038996896] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 03:22:19,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:22:19,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14] total 23 [2022-12-14 03:22:19,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302408279] [2022-12-14 03:22:19,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:22:19,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 03:22:19,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:22:19,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 03:22:19,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-12-14 03:22:19,286 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-12-14 03:22:58,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2022-12-14 03:22:58,196 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-12-14 03:22:58,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 03:22:58,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 52.3s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-12-14 03:22:58,198 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 03:22:58,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 03:22:58,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 03:22:58,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:22:58,399 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:625) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:361) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:391) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:230) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 55 more [2022-12-14 03:22:58,402 INFO L158 Benchmark]: Toolchain (without parser) took 865285.30ms. Allocated memory is still 157.3MB. Free memory was 124.0MB in the beginning and 90.5MB in the end (delta: 33.5MB). Peak memory consumption was 98.0MB. Max. memory is 16.1GB. [2022-12-14 03:22:58,402 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 125.8MB. Free memory is still 64.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 03:22:58,402 INFO L158 Benchmark]: CACSL2BoogieTranslator took 181.16ms. Allocated memory is still 157.3MB. Free memory was 124.0MB in the beginning and 113.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 03:22:58,402 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.56ms. Allocated memory is still 157.3MB. Free memory was 113.6MB in the beginning and 112.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 03:22:58,402 INFO L158 Benchmark]: Boogie Preprocessor took 16.82ms. Allocated memory is still 157.3MB. Free memory was 112.1MB in the beginning and 111.1MB in the end (delta: 944.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 03:22:58,403 INFO L158 Benchmark]: RCFGBuilder took 260.04ms. Allocated memory is still 157.3MB. Free memory was 111.1MB in the beginning and 98.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 03:22:58,403 INFO L158 Benchmark]: TraceAbstraction took 864798.10ms. Allocated memory is still 157.3MB. Free memory was 98.0MB in the beginning and 90.5MB in the end (delta: 7.5MB). Peak memory consumption was 70.8MB. Max. memory is 16.1GB. [2022-12-14 03:22:58,404 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 125.8MB. Free memory is still 64.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 181.16ms. Allocated memory is still 157.3MB. Free memory was 124.0MB in the beginning and 113.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.56ms. Allocated memory is still 157.3MB. Free memory was 113.6MB in the beginning and 112.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.82ms. Allocated memory is still 157.3MB. Free memory was 112.1MB in the beginning and 111.1MB in the end (delta: 944.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 260.04ms. Allocated memory is still 157.3MB. Free memory was 111.1MB in the beginning and 98.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 864798.10ms. Allocated memory is still 157.3MB. Free memory was 98.0MB in the beginning and 90.5MB in the end (delta: 7.5MB). Peak memory consumption was 70.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a95a21aef2f50b6142b75e9167422e223cf73e944019da3877f24b8f537b25b5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 03:22:59,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 03:22:59,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 03:22:59,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 03:22:59,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 03:22:59,594 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 03:22:59,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 03:22:59,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 03:22:59,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 03:22:59,600 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 03:22:59,601 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 03:22:59,603 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 03:22:59,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 03:22:59,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 03:22:59,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 03:22:59,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 03:22:59,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 03:22:59,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 03:22:59,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 03:22:59,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 03:22:59,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 03:22:59,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 03:22:59,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 03:22:59,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 03:22:59,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 03:22:59,621 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 03:22:59,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 03:22:59,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 03:22:59,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 03:22:59,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 03:22:59,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 03:22:59,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 03:22:59,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 03:22:59,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 03:22:59,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 03:22:59,628 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 03:22:59,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 03:22:59,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 03:22:59,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 03:22:59,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 03:22:59,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 03:22:59,631 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-12-14 03:22:59,646 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 03:22:59,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 03:22:59,647 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 03:22:59,647 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 03:22:59,647 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 03:22:59,647 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 03:22:59,648 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 03:22:59,648 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 03:22:59,648 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 03:22:59,648 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 03:22:59,648 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 03:22:59,648 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 03:22:59,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 03:22:59,649 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 03:22:59,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 03:22:59,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 03:22:59,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 03:22:59,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 03:22:59,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 03:22:59,649 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 03:22:59,650 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 03:22:59,650 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 03:22:59,650 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 03:22:59,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 03:22:59,650 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 03:22:59,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 03:22:59,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 03:22:59,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 03:22:59,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 03:22:59,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:22:59,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 03:22:59,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 03:22:59,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 03:22:59,651 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 03:22:59,651 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 03:22:59,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 03:22:59,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 03:22:59,652 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 03:22:59,652 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a95a21aef2f50b6142b75e9167422e223cf73e944019da3877f24b8f537b25b5 [2022-12-14 03:22:59,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 03:22:59,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 03:22:59,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 03:22:59,900 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 03:22:59,900 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 03:22:59,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2022-12-14 03:23:02,503 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 03:23:02,672 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 03:23:02,673 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2022-12-14 03:23:02,679 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/data/8177ebb75/d9f69ee60295476180c32cb688489726/FLAGf4143c4fa [2022-12-14 03:23:03,063 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/data/8177ebb75/d9f69ee60295476180c32cb688489726 [2022-12-14 03:23:03,065 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 03:23:03,066 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 03:23:03,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 03:23:03,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 03:23:03,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 03:23:03,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:23:03" (1/1) ... [2022-12-14 03:23:03,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72596d4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:03, skipping insertion in model container [2022-12-14 03:23:03,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:23:03" (1/1) ... [2022-12-14 03:23:03,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 03:23:03,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 03:23:03,214 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c[537,550] [2022-12-14 03:23:03,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:23:03,233 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 03:23:03,241 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c[537,550] [2022-12-14 03:23:03,245 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:23:03,255 INFO L208 MainTranslator]: Completed translation [2022-12-14 03:23:03,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:03 WrapperNode [2022-12-14 03:23:03,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 03:23:03,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 03:23:03,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 03:23:03,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 03:23:03,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:03" (1/1) ... [2022-12-14 03:23:03,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:03" (1/1) ... [2022-12-14 03:23:03,278 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 40 [2022-12-14 03:23:03,278 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 03:23:03,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 03:23:03,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 03:23:03,279 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 03:23:03,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:03" (1/1) ... [2022-12-14 03:23:03,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:03" (1/1) ... [2022-12-14 03:23:03,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:03" (1/1) ... [2022-12-14 03:23:03,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:03" (1/1) ... [2022-12-14 03:23:03,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:03" (1/1) ... [2022-12-14 03:23:03,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:03" (1/1) ... [2022-12-14 03:23:03,293 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:03" (1/1) ... [2022-12-14 03:23:03,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:03" (1/1) ... [2022-12-14 03:23:03,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 03:23:03,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 03:23:03,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 03:23:03,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 03:23:03,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:03" (1/1) ... [2022-12-14 03:23:03,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:23:03,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:23:03,319 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 03:23:03,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 03:23:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 03:23:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 03:23:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 03:23:03,356 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 03:23:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 03:23:03,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 03:23:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 03:23:03,356 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 03:23:03,408 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 03:23:03,409 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 03:23:03,616 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 03:23:03,621 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 03:23:03,621 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 03:23:03,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:23:03 BoogieIcfgContainer [2022-12-14 03:23:03,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 03:23:03,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 03:23:03,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 03:23:03,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 03:23:03,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:23:03" (1/3) ... [2022-12-14 03:23:03,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d27e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:23:03, skipping insertion in model container [2022-12-14 03:23:03,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:23:03" (2/3) ... [2022-12-14 03:23:03,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d27e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:23:03, skipping insertion in model container [2022-12-14 03:23:03,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:23:03" (3/3) ... [2022-12-14 03:23:03,629 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound20.c [2022-12-14 03:23:03,643 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 03:23:03,643 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 03:23:03,679 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 03:23:03,684 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;@4409fed0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 03:23:03,684 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 03:23:03,688 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 03:23:03,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 03:23:03,694 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:23:03,694 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:23:03,695 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:23:03,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:23:03,699 INFO L85 PathProgramCache]: Analyzing trace with hash -861605892, now seen corresponding path program 1 times [2022-12-14 03:23:03,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 03:23:03,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692424635] [2022-12-14 03:23:03,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:23:03,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 03:23:03,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 03:23:03,710 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 03:23:03,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 03:23:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:23:03,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 03:23:03,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:23:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:23:03,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:23:03,860 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 03:23:03,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692424635] [2022-12-14 03:23:03,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692424635] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:23:03,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:23:03,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:23:03,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308680770] [2022-12-14 03:23:03,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:23:03,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 03:23:03,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 03:23:03,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 03:23:03,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 03:23:03,889 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 03:23:03,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:23:03,909 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2022-12-14 03:23:03,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 03:23:03,911 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-12-14 03:23:03,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:23:03,918 INFO L225 Difference]: With dead ends: 51 [2022-12-14 03:23:03,918 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 03:23:03,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 03:23:03,923 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:23:03,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:23:03,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 03:23:03,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-14 03:23:03,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 03:23:03,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-12-14 03:23:03,949 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 24 [2022-12-14 03:23:03,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:23:03,950 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-12-14 03:23:03,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 03:23:03,950 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-12-14 03:23:03,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 03:23:03,951 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:23:03,951 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:23:03,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 03:23:04,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 03:23:04,154 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:23:04,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:23:04,157 INFO L85 PathProgramCache]: Analyzing trace with hash -2010313222, now seen corresponding path program 1 times [2022-12-14 03:23:04,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 03:23:04,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164738145] [2022-12-14 03:23:04,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:23:04,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 03:23:04,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 03:23:04,163 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 03:23:04,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 03:23:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:23:04,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 03:23:04,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:23:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 03:23:04,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:23:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 03:23:08,016 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 03:23:08,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164738145] [2022-12-14 03:23:08,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164738145] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 03:23:08,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:23:08,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-12-14 03:23:08,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006226374] [2022-12-14 03:23:08,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:23:08,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 03:23:08,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 03:23:08,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 03:23:08,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-12-14 03:23:08,022 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 03:23:13,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 03:23:14,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:23:14,955 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-12-14 03:23:14,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 03:23:14,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-12-14 03:23:14,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:23:14,971 INFO L225 Difference]: With dead ends: 35 [2022-12-14 03:23:14,971 INFO L226 Difference]: Without dead ends: 33 [2022-12-14 03:23:14,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-12-14 03:23:14,974 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-12-14 03:23:14,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 70 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2022-12-14 03:23:14,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-12-14 03:23:14,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-12-14 03:23:14,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 03:23:14,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-12-14 03:23:14,983 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2022-12-14 03:23:14,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:23:14,984 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-12-14 03:23:14,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 03:23:14,984 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-12-14 03:23:14,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 03:23:14,985 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:23:14,985 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:23:14,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 03:23:15,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 03:23:15,187 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:23:15,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:23:15,190 INFO L85 PathProgramCache]: Analyzing trace with hash -895979555, now seen corresponding path program 1 times [2022-12-14 03:23:15,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 03:23:15,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358892103] [2022-12-14 03:23:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:23:15,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 03:23:15,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 03:23:15,198 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 03:23:15,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 03:23:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:23:15,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 03:23:15,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:23:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 03:23:15,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:23:15,570 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 03:23:15,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358892103] [2022-12-14 03:23:15,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358892103] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:23:15,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:23:15,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 03:23:15,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735386064] [2022-12-14 03:23:15,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:23:15,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 03:23:15,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 03:23:15,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 03:23:15,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:23:15,575 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 03:23:16,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:23:16,264 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-12-14 03:23:16,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 03:23:16,264 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2022-12-14 03:23:16,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:23:16,265 INFO L225 Difference]: With dead ends: 39 [2022-12-14 03:23:16,265 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 03:23:16,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 03:23:16,266 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 03:23:16,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 68 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 03:23:16,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 03:23:16,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-12-14 03:23:16,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 03:23:16,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-12-14 03:23:16,272 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 30 [2022-12-14 03:23:16,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:23:16,272 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-12-14 03:23:16,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 03:23:16,272 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-12-14 03:23:16,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 03:23:16,273 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:23:16,273 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:23:16,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 03:23:16,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 03:23:16,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:23:16,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:23:16,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1371702355, now seen corresponding path program 1 times [2022-12-14 03:23:16,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 03:23:16,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243935294] [2022-12-14 03:23:16,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:23:16,479 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 03:23:16,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 03:23:16,481 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 03:23:16,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8115db0-b4d3-4e03-a181-1f6fa5741433/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 03:23:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:23:16,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 03:23:16,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:23:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 03:23:25,737 INFO L328 TraceCheckSpWp]: Computing backward predicates...