./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound2.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_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/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_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/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_70758565-db95-4aa9-80f1-30692b3b3d6a/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 b8de068d3fcf052deeb5e32fe868ca4e216251d5e7d95b0bfb671288b38bb68d --- 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 13:33:04,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:33:04,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:33:04,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:33:04,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:33:04,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:33:04,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:33:04,724 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:33:04,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:33:04,726 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:33:04,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:33:04,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:33:04,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:33:04,729 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:33:04,730 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:33:04,731 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:33:04,732 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:33:04,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:33:04,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:33:04,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:33:04,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:33:04,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:33:04,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:33:04,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:33:04,743 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:33:04,743 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:33:04,743 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:33:04,744 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:33:04,744 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:33:04,745 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:33:04,745 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:33:04,746 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:33:04,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:33:04,747 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:33:04,748 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:33:04,748 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:33:04,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:33:04,749 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:33:04,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:33:04,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:33:04,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:33:04,752 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:33:04,771 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:33:04,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:33:04,771 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:33:04,771 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:33:04,772 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:33:04,772 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:33:04,772 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:33:04,772 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:33:04,773 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:33:04,773 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:33:04,773 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:33:04,773 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:33:04,773 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:33:04,773 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:33:04,773 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:33:04,774 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:33:04,774 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:33:04,774 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:33:04,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:33:04,775 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:33:04,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:33:04,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:33:04,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:33:04,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:33:04,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:33:04,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:33:04,776 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:33:04,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:33:04,776 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:33:04,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:33:04,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:33:04,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:33:04,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:33:04,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:33:04,777 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:33:04,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:33:04,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:33:04,777 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:33:04,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:33:04,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:33:04,778 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:33:04,778 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_70758565-db95-4aa9-80f1-30692b3b3d6a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8de068d3fcf052deeb5e32fe868ca4e216251d5e7d95b0bfb671288b38bb68d [2022-12-14 13:33:05,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:33:05,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:33:05,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:33:05,023 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:33:05,023 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:33:05,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound2.c [2022-12-14 13:33:07,625 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:33:07,759 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:33:07,759 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound2.c [2022-12-14 13:33:07,765 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/data/6187e2e62/1446df211e604a60b6db31c9764cd104/FLAG92ad3e826 [2022-12-14 13:33:07,777 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/data/6187e2e62/1446df211e604a60b6db31c9764cd104 [2022-12-14 13:33:07,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:33:07,780 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:33:07,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:33:07,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:33:07,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:33:07,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:33:07" (1/1) ... [2022-12-14 13:33:07,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1721658b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:33:07, skipping insertion in model container [2022-12-14 13:33:07,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:33:07" (1/1) ... [2022-12-14 13:33:07,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:33:07,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:33:07,927 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_70758565-db95-4aa9-80f1-30692b3b3d6a/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound2.c[537,550] [2022-12-14 13:33:07,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:33:07,953 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:33:07,962 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_70758565-db95-4aa9-80f1-30692b3b3d6a/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound2.c[537,550] [2022-12-14 13:33:07,966 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:33:07,976 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:33:07,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:33:07 WrapperNode [2022-12-14 13:33:07,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:33:07,977 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:33:07,977 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:33:07,977 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:33:07,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:33:07" (1/1) ... [2022-12-14 13:33:07,987 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:33:07" (1/1) ... [2022-12-14 13:33:08,004 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2022-12-14 13:33:08,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:33:08,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:33:08,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:33:08,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:33:08,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:33:07" (1/1) ... [2022-12-14 13:33:08,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:33:07" (1/1) ... [2022-12-14 13:33:08,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:33:07" (1/1) ... [2022-12-14 13:33:08,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:33:07" (1/1) ... [2022-12-14 13:33:08,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:33:07" (1/1) ... [2022-12-14 13:33:08,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:33:07" (1/1) ... [2022-12-14 13:33:08,023 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:33:07" (1/1) ... [2022-12-14 13:33:08,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:33:07" (1/1) ... [2022-12-14 13:33:08,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:33:08,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:33:08,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:33:08,026 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:33:08,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:33:07" (1/1) ... [2022-12-14 13:33:08,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:33:08,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:33:08,056 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:33:08,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:33:08,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:33:08,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:33:08,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:33:08,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:33:08,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 13:33:08,093 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 13:33:08,152 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:33:08,154 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:33:08,252 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:33:08,291 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:33:08,291 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 13:33:08,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:33:08 BoogieIcfgContainer [2022-12-14 13:33:08,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:33:08,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:33:08,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:33:08,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:33:08,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:33:07" (1/3) ... [2022-12-14 13:33:08,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1451994d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:33:08, skipping insertion in model container [2022-12-14 13:33:08,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:33:07" (2/3) ... [2022-12-14 13:33:08,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1451994d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:33:08, skipping insertion in model container [2022-12-14 13:33:08,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:33:08" (3/3) ... [2022-12-14 13:33:08,302 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound2.c [2022-12-14 13:33:08,317 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:33:08,317 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:33:08,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:33:08,357 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;@d4333b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:33:08,357 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:33:08,360 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 13:33:08,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:33:08,367 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:33:08,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 13:33:08,368 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:33:08,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:33:08,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1628036165, now seen corresponding path program 1 times [2022-12-14 13:33:08,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:33:08,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801669062] [2022-12-14 13:33:08,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:08,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:33:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:33:08,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:33:08,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801669062] [2022-12-14 13:33:08,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 13:33:08,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787944104] [2022-12-14 13:33:08,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:08,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:08,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:33:08,495 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:33:08,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:33:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:33:08,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 13:33:08,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:33:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:08,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:33:08,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787944104] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:33:08,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:33:08,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:33:08,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273371905] [2022-12-14 13:33:08,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:33:08,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 13:33:08,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:33:08,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 13:33:08,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 13:33:08,600 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:33:08,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:33:08,633 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-12-14 13:33:08,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 13:33:08,636 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 13:33:08,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:33:08,642 INFO L225 Difference]: With dead ends: 27 [2022-12-14 13:33:08,642 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 13:33:08,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 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 13:33:08,648 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:33:08,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:33:08,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 13:33:08,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-14 13:33:08,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 13:33:08,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-12-14 13:33:08,680 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2022-12-14 13:33:08,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:33:08,680 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-12-14 13:33:08,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:33:08,681 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-12-14 13:33:08,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:33:08,681 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:33:08,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:33:08,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:33:08,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 13:33:08,884 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:33:08,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:33:08,888 INFO L85 PathProgramCache]: Analyzing trace with hash 464117524, now seen corresponding path program 1 times [2022-12-14 13:33:08,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:33:08,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052888403] [2022-12-14 13:33:08,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:08,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:33:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:33:08,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:33:08,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052888403] [2022-12-14 13:33:08,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 13:33:08,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717222846] [2022-12-14 13:33:08,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:08,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:08,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:33:08,979 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:33:08,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:33:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:33:09,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:33:09,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:33:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:09,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:33:09,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717222846] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:33:09,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:33:09,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:33:09,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079278095] [2022-12-14 13:33:09,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:33:09,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:33:09,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:33:09,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:33:09,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:33:09,061 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:33:09,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:33:09,079 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-12-14 13:33:09,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:33:09,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 13:33:09,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:33:09,080 INFO L225 Difference]: With dead ends: 21 [2022-12-14 13:33:09,080 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 13:33:09,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:33:09,082 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:33:09,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:33:09,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 13:33:09,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-12-14 13:33:09,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 13:33:09,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-12-14 13:33:09,087 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2022-12-14 13:33:09,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:33:09,087 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-12-14 13:33:09,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:33:09,088 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-12-14 13:33:09,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:33:09,088 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:33:09,088 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:33:09,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:33:09,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:09,291 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:33:09,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:33:09,293 INFO L85 PathProgramCache]: Analyzing trace with hash 465904984, now seen corresponding path program 1 times [2022-12-14 13:33:09,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:33:09,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074451980] [2022-12-14 13:33:09,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:09,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:33:09,334 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:33:09,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38329990] [2022-12-14 13:33:09,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:09,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:09,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:33:09,337 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:33:09,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:33:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:33:09,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 13:33:09,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:33:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:09,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:33:09,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:33:09,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074451980] [2022-12-14 13:33:09,427 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:33:09,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38329990] [2022-12-14 13:33:09,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38329990] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:33:09,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:33:09,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:33:09,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195412282] [2022-12-14 13:33:09,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:33:09,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:33:09,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:33:09,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:33:09,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:33:09,429 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:33:09,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:33:09,468 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-12-14 13:33:09,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:33:09,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 13:33:09,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:33:09,470 INFO L225 Difference]: With dead ends: 23 [2022-12-14 13:33:09,470 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 13:33:09,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 13:33:09,471 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:33:09,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:33:09,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 13:33:09,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-12-14 13:33:09,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 13:33:09,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-12-14 13:33:09,478 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 7 [2022-12-14 13:33:09,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:33:09,478 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-12-14 13:33:09,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:33:09,479 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-12-14 13:33:09,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 13:33:09,479 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:33:09,479 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:33:09,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:33:09,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:09,682 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:33:09,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:33:09,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1433201903, now seen corresponding path program 1 times [2022-12-14 13:33:09,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:33:09,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979125215] [2022-12-14 13:33:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:09,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:33:09,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:33:09,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692790482] [2022-12-14 13:33:09,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:09,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:09,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:33:09,729 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:33:09,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:33:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:33:09,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 13:33:09,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:33:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:09,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:33:09,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:33:09,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979125215] [2022-12-14 13:33:09,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:33:09,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692790482] [2022-12-14 13:33:09,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692790482] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:33:09,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:33:09,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:33:09,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436375991] [2022-12-14 13:33:09,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:33:09,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:33:09,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:33:09,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:33:09,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:33:09,801 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 13:33:09,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:33:09,813 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-12-14 13:33:09,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:33:09,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-12-14 13:33:09,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:33:09,814 INFO L225 Difference]: With dead ends: 27 [2022-12-14 13:33:09,814 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 13:33:09,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:33:09,815 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:33:09,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:33:09,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 13:33:09,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 13:33:09,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 13:33:09,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-12-14 13:33:09,820 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2022-12-14 13:33:09,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:33:09,820 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-12-14 13:33:09,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 13:33:09,821 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-12-14 13:33:09,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 13:33:09,821 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:33:09,822 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:33:09,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:33:10,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:10,024 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:33:10,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:33:10,026 INFO L85 PathProgramCache]: Analyzing trace with hash -516596709, now seen corresponding path program 1 times [2022-12-14 13:33:10,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:33:10,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019684961] [2022-12-14 13:33:10,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:10,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:33:10,044 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:33:10,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146935092] [2022-12-14 13:33:10,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:10,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:10,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:33:10,046 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:33:10,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:33:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:33:10,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 13:33:10,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:33:10,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:10,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:33:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:10,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:33:10,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019684961] [2022-12-14 13:33:10,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:33:10,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146935092] [2022-12-14 13:33:10,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146935092] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:33:10,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1426196625] [2022-12-14 13:33:10,148 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 13:33:10,149 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:33:10,151 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:33:10,155 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:33:10,155 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:33:10,631 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 13:33:10,762 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:33:11,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '429#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 13:33:11,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:33:11,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:33:11,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2022-12-14 13:33:11,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414444220] [2022-12-14 13:33:11,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 13:33:11,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:33:11,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:33:11,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:33:11,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-12-14 13:33:11,380 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 13:33:11,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:33:11,405 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-12-14 13:33:11,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:33:11,406 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2022-12-14 13:33:11,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:33:11,406 INFO L225 Difference]: With dead ends: 29 [2022-12-14 13:33:11,406 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 13:33:11,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-12-14 13:33:11,407 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:33:11,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:33:11,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 13:33:11,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-14 13:33:11,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 13:33:11,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-12-14 13:33:11,410 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2022-12-14 13:33:11,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:33:11,410 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-12-14 13:33:11,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 13:33:11,411 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-12-14 13:33:11,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 13:33:11,411 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:33:11,411 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:33:11,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 13:33:11,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:11,612 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:33:11,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:33:11,613 INFO L85 PathProgramCache]: Analyzing trace with hash -514809249, now seen corresponding path program 1 times [2022-12-14 13:33:11,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:33:11,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039590761] [2022-12-14 13:33:11,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:11,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:33:11,627 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:33:11,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604937817] [2022-12-14 13:33:11,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:11,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:11,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:33:11,629 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:33:11,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:33:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:33:11,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 13:33:11,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:33:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:14,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:33:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:19,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:33:19,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039590761] [2022-12-14 13:33:19,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:33:19,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604937817] [2022-12-14 13:33:19,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604937817] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:33:19,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [224330028] [2022-12-14 13:33:19,069 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:33:19,069 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:33:19,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:33:19,069 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:33:19,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:33:19,368 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2022-12-14 13:33:19,390 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:33:21,977 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '606#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (< ~counter~0 3) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:33:21,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:33:21,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:33:21,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-12-14 13:33:21,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746665918] [2022-12-14 13:33:21,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 13:33:21,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 13:33:21,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:33:21,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 13:33:21,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-12-14 13:33:21,979 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 13:33:24,243 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 13:33:33,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:33:33,293 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-12-14 13:33:33,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 13:33:33,294 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-12-14 13:33:33,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:33:33,296 INFO L225 Difference]: With dead ends: 40 [2022-12-14 13:33:33,296 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 13:33:33,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=102, Invalid=496, Unknown=2, NotChecked=0, Total=600 [2022-12-14 13:33:33,297 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:33:33,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 58 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 115 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 13:33:33,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 13:33:33,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2022-12-14 13:33:33,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.28) internal successors, (32), 27 states have internal predecessors, (32), 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 13:33:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2022-12-14 13:33:33,307 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 15 [2022-12-14 13:33:33,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:33:33,307 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2022-12-14 13:33:33,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 13:33:33,307 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2022-12-14 13:33:33,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 13:33:33,309 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:33:33,309 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 13:33:33,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 13:33:33,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:33,510 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:33:33,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:33:33,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1676822710, now seen corresponding path program 1 times [2022-12-14 13:33:33,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:33:33,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997006047] [2022-12-14 13:33:33,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:33,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:33:33,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:33:33,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852930701] [2022-12-14 13:33:33,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:33,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:33,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:33:33,522 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:33:33,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:33:33,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:33:33,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 13:33:33,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:33:33,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:33:33,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:33:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:33:33,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:33:33,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997006047] [2022-12-14 13:33:33,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:33:33,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852930701] [2022-12-14 13:33:33,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852930701] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:33:33,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [541268200] [2022-12-14 13:33:33,648 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 13:33:33,648 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:33:33,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:33:33,649 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:33:33,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:33:33,891 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 60 for LOIs [2022-12-14 13:33:33,966 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:33:34,503 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '859#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (< ~counter~0 3) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:33:34,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:33:34,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:33:34,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-12-14 13:33:34,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003954437] [2022-12-14 13:33:34,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 13:33:34,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 13:33:34,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:33:34,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 13:33:34,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-12-14 13:33:34,505 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 13:33:34,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:33:34,585 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2022-12-14 13:33:34,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:33:34,586 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2022-12-14 13:33:34,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:33:34,587 INFO L225 Difference]: With dead ends: 42 [2022-12-14 13:33:34,587 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 13:33:34,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-12-14 13:33:34,588 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:33:34,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 51 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:33:34,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 13:33:34,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-12-14 13:33:34,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 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 13:33:34,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-12-14 13:33:34,594 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 21 [2022-12-14 13:33:34,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:33:34,594 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-12-14 13:33:34,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 13:33:34,594 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-12-14 13:33:34,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 13:33:34,594 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:33:34,595 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 13:33:34,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:33:34,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 13:33:34,796 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:33:34,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:33:34,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1674764834, now seen corresponding path program 2 times [2022-12-14 13:33:34,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:33:34,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461691720] [2022-12-14 13:33:34,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:34,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:33:34,823 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 13:33:34,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853616478] [2022-12-14 13:33:34,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:33:34,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:34,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:33:34,827 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:33:34,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:33:34,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:33:34,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-12-14 13:33:34,865 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 13:33:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 13:33:34,888 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 13:33:34,888 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 13:33:34,889 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 13:33:34,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 13:33:35,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:35,095 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2022-12-14 13:33:35,100 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 13:33:35,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 01:33:35 BoogieIcfgContainer [2022-12-14 13:33:35,128 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 13:33:35,128 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 13:33:35,128 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 13:33:35,129 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 13:33:35,129 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:33:08" (3/4) ... [2022-12-14 13:33:35,131 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 13:33:35,158 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 13:33:35,159 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 13:33:35,159 INFO L158 Benchmark]: Toolchain (without parser) took 27379.44ms. Allocated memory was 134.2MB in the beginning and 174.1MB in the end (delta: 39.8MB). Free memory was 94.0MB in the beginning and 65.4MB in the end (delta: 28.6MB). Peak memory consumption was 69.4MB. Max. memory is 16.1GB. [2022-12-14 13:33:35,159 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 134.2MB. Free memory is still 105.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 13:33:35,160 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.90ms. Allocated memory is still 134.2MB. Free memory was 93.6MB in the beginning and 83.5MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 13:33:35,160 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.43ms. Allocated memory is still 134.2MB. Free memory was 83.5MB in the beginning and 81.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 13:33:35,160 INFO L158 Benchmark]: Boogie Preprocessor took 20.29ms. Allocated memory is still 134.2MB. Free memory was 81.9MB in the beginning and 81.0MB in the end (delta: 926.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 13:33:35,160 INFO L158 Benchmark]: RCFGBuilder took 267.28ms. Allocated memory is still 134.2MB. Free memory was 80.5MB in the beginning and 68.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 13:33:35,161 INFO L158 Benchmark]: TraceAbstraction took 26832.20ms. Allocated memory was 134.2MB in the beginning and 174.1MB in the end (delta: 39.8MB). Free memory was 67.2MB in the beginning and 67.5MB in the end (delta: -253.6kB). Peak memory consumption was 40.1MB. Max. memory is 16.1GB. [2022-12-14 13:33:35,161 INFO L158 Benchmark]: Witness Printer took 30.29ms. Allocated memory is still 174.1MB. Free memory was 67.5MB in the beginning and 65.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 13:33:35,162 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 134.2MB. Free memory is still 105.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 195.90ms. Allocated memory is still 134.2MB. Free memory was 93.6MB in the beginning and 83.5MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.43ms. Allocated memory is still 134.2MB. Free memory was 83.5MB in the beginning and 81.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.29ms. Allocated memory is still 134.2MB. Free memory was 81.9MB in the beginning and 81.0MB in the end (delta: 926.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 267.28ms. Allocated memory is still 134.2MB. Free memory was 80.5MB in the beginning and 68.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 26832.20ms. Allocated memory was 134.2MB in the beginning and 174.1MB in the end (delta: 39.8MB). Free memory was 67.2MB in the beginning and 67.5MB in the end (delta: -253.6kB). Peak memory consumption was 40.1MB. Max. memory is 16.1GB. * Witness Printer took 30.29ms. Allocated memory is still 174.1MB. Free memory was 67.5MB in the beginning and 65.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int counter = 0; [L22] int a, b; [L23] long long x, y, z; [L25] a = __VERIFIER_nondet_int() [L26] b = __VERIFIER_nondet_int() [L27] CALL assume_abort_if_not(b >= 1) [L10] COND FALSE !(!cond) [L27] RET assume_abort_if_not(b >= 1) [L29] x = a [L30] y = b [L31] z = 0 VAL [a=2, b=5, counter=0, x=2, y=5, z=0] [L33] EXPR counter++ VAL [a=2, b=5, counter=1, counter++=0, x=2, y=5, z=0] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=1] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=2, b=5, counter=1, x=2, y=5, z=0] [L35] COND FALSE !(!(y != 0)) [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 [L42] x = 2 * x [L43] y = y / 2 VAL [a=2, b=5, counter=1, x=4, y=2, z=2] [L33] EXPR counter++ VAL [a=2, b=5, counter=2, counter++=1, x=4, y=2, z=2] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=2] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=2, b=5, counter=2, x=4, y=2, z=2] [L35] COND FALSE !(!(y != 0)) [L38] COND FALSE !(y % 2 == 1) [L42] x = 2 * x [L43] y = y / 2 VAL [a=2, b=5, counter=2, x=8, y=1, z=2] [L33] EXPR counter++ VAL [a=2, b=5, counter=3, counter++=2, x=8, y=1, z=2] [L33] COND FALSE !(counter++<2) [L45] CALL __VERIFIER_assert(z == (long long) a * b) VAL [\old(cond)=0, counter=3] [L13] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=3] [L15] reach_error() VAL [\old(cond)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 26.8s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 11.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 51 SdHoareTripleChecker+Valid, 2.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 48 mSDsluCounter, 238 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 162 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 259 IncrementalHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 76 mSDtfsCounter, 259 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 184 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 16.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=6, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 7.6s InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 125 ConstructedInterpolants, 1 QuantifiedInterpolants, 665 SizeOfPredicates, 18 NumberOfNonLiveVariables, 470 ConjunctsInSsa, 69 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 30/44 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-14 13:33:35,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70758565-db95-4aa9-80f1-30692b3b3d6a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE