./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9885703216edf9cfe4bfb438db591a48e102e73a3e0423f90ce871c05fdf2b57 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:32:14,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:32:14,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:32:14,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:32:14,757 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:32:14,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:32:14,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:32:14,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:32:14,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:32:14,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:32:14,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:32:14,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:32:14,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:32:14,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:32:14,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:32:14,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:32:14,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:32:14,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:32:14,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:32:14,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:32:14,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:32:14,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:32:14,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:32:14,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:32:14,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:32:14,783 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:32:14,783 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:32:14,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:32:14,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:32:14,785 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:32:14,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:32:14,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:32:14,787 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:32:14,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:32:14,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:32:14,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:32:14,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:32:14,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:32:14,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:32:14,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:32:14,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:32:14,798 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:32:14,831 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:32:14,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:32:14,831 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:32:14,832 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:32:14,832 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:32:14,832 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:32:14,833 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:32:14,833 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:32:14,833 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:32:14,833 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:32:14,833 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:32:14,834 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:32:14,834 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:32:14,834 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:32:14,834 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:32:14,835 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:32:14,835 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:32:14,841 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:32:14,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:32:14,842 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:32:14,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:32:14,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:32:14,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:32:14,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:32:14,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:32:14,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:32:14,844 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:32:14,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:32:14,845 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:32:14,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:32:14,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:32:14,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:32:14,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:32:14,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:32:14,847 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:32:14,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:32:14,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:32:14,848 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:32:14,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:32:14,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:32:14,848 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:32:14,849 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_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9885703216edf9cfe4bfb438db591a48e102e73a3e0423f90ce871c05fdf2b57 [2022-11-25 23:32:15,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:32:15,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:32:15,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:32:15,205 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:32:15,206 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:32:15,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i [2022-11-25 23:32:18,247 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:32:18,612 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:32:18,613 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i [2022-11-25 23:32:18,628 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/data/7f5321e7b/24da3a95672e4723a96893af425aa0c2/FLAGbe18a5be2 [2022-11-25 23:32:18,646 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/data/7f5321e7b/24da3a95672e4723a96893af425aa0c2 [2022-11-25 23:32:18,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:32:18,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:32:18,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:32:18,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:32:18,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:32:18,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:32:18" (1/1) ... [2022-11-25 23:32:18,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d423319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:18, skipping insertion in model container [2022-11-25 23:32:18,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:32:18" (1/1) ... [2022-11-25 23:32:18,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:32:18,734 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:32:19,274 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_184c639f-1d46-4668-bfd2-a06a47042db8/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i[33022,33035] [2022-11-25 23:32:19,484 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 23:32:19,502 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 23:32:19,528 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 23:32:19,556 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 23:32:19,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:32:19,592 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:32:19,644 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_184c639f-1d46-4668-bfd2-a06a47042db8/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i[33022,33035] [2022-11-25 23:32:19,733 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 23:32:19,742 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 23:32:19,750 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 23:32:19,759 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 23:32:19,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:32:19,796 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:32:19,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:19 WrapperNode [2022-11-25 23:32:19,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:32:19,797 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:32:19,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:32:19,798 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:32:19,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:19" (1/1) ... [2022-11-25 23:32:19,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:19" (1/1) ... [2022-11-25 23:32:19,917 INFO L138 Inliner]: procedures = 177, calls = 524, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2167 [2022-11-25 23:32:19,917 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:32:19,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:32:19,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:32:19,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:32:19,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:19" (1/1) ... [2022-11-25 23:32:19,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:19" (1/1) ... [2022-11-25 23:32:19,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:19" (1/1) ... [2022-11-25 23:32:19,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:19" (1/1) ... [2022-11-25 23:32:20,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:19" (1/1) ... [2022-11-25 23:32:20,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:19" (1/1) ... [2022-11-25 23:32:20,049 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:19" (1/1) ... [2022-11-25 23:32:20,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:19" (1/1) ... [2022-11-25 23:32:20,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:32:20,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:32:20,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:32:20,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:32:20,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:19" (1/1) ... [2022-11-25 23:32:20,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:32:20,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:20,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:32:20,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:32:20,180 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2022-11-25 23:32:20,180 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2022-11-25 23:32:20,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:32:20,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 23:32:20,180 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 23:32:20,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:32:20,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-25 23:32:20,180 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-25 23:32:20,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 23:32:20,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:32:20,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 23:32:20,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:32:20,181 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-25 23:32:20,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 23:32:20,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:32:20,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:32:20,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:32:20,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:32:20,461 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:32:20,463 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:32:23,062 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:32:23,913 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:32:23,914 INFO L300 CfgBuilder]: Removed 151 assume(true) statements. [2022-11-25 23:32:23,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:32:23 BoogieIcfgContainer [2022-11-25 23:32:23,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:32:23,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:32:23,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:32:23,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:32:23,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:32:18" (1/3) ... [2022-11-25 23:32:23,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157c308a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:32:23, skipping insertion in model container [2022-11-25 23:32:23,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:19" (2/3) ... [2022-11-25 23:32:23,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157c308a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:32:23, skipping insertion in model container [2022-11-25 23:32:23,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:32:23" (3/3) ... [2022-11-25 23:32:23,931 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_BER_test10-1.i [2022-11-25 23:32:23,951 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:32:23,951 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:32:24,025 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:32:24,033 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;@6d35ad7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:32:24,034 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:32:24,041 INFO L276 IsEmpty]: Start isEmpty. Operand has 251 states, 232 states have (on average 1.8275862068965518) internal successors, (424), 237 states have internal predecessors, (424), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-25 23:32:24,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:32:24,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:24,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:24,054 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:32:24,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:24,062 INFO L85 PathProgramCache]: Analyzing trace with hash 57065197, now seen corresponding path program 1 times [2022-11-25 23:32:24,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:24,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913968147] [2022-11-25 23:32:24,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:24,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:32:24,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:24,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913968147] [2022-11-25 23:32:24,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913968147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:24,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:24,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:32:24,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217346578] [2022-11-25 23:32:24,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:24,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 23:32:24,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:24,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 23:32:24,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:32:24,390 INFO L87 Difference]: Start difference. First operand has 251 states, 232 states have (on average 1.8275862068965518) internal successors, (424), 237 states have internal predecessors, (424), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:32:26,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-25 23:32:26,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:26,262 INFO L93 Difference]: Finished difference Result 501 states and 911 transitions. [2022-11-25 23:32:26,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 23:32:26,264 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 23:32:26,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:26,275 INFO L225 Difference]: With dead ends: 501 [2022-11-25 23:32:26,276 INFO L226 Difference]: Without dead ends: 249 [2022-11-25 23:32:26,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:32:26,282 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:26,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 279 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-25 23:32:26,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-25 23:32:26,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-11-25 23:32:26,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 231 states have (on average 1.199134199134199) internal successors, (277), 236 states have internal predecessors, (277), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 23:32:26,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 304 transitions. [2022-11-25 23:32:26,336 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 304 transitions. Word has length 12 [2022-11-25 23:32:26,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:26,337 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 304 transitions. [2022-11-25 23:32:26,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:32:26,337 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 304 transitions. [2022-11-25 23:32:26,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 23:32:26,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:26,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:26,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:32:26,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:32:26,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:26,341 INFO L85 PathProgramCache]: Analyzing trace with hash -344877955, now seen corresponding path program 1 times [2022-11-25 23:32:26,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:26,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756633591] [2022-11-25 23:32:26,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:26,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:32:26,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:26,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756633591] [2022-11-25 23:32:26,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756633591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:26,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:26,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:32:26,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280959586] [2022-11-25 23:32:26,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:26,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:32:26,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:26,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:32:26,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:32:26,797 INFO L87 Difference]: Start difference. First operand 249 states and 304 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:32:30,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-25 23:32:31,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:31,806 INFO L93 Difference]: Finished difference Result 425 states and 521 transitions. [2022-11-25 23:32:31,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:32:31,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-25 23:32:31,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:31,809 INFO L225 Difference]: With dead ends: 425 [2022-11-25 23:32:31,809 INFO L226 Difference]: Without dead ends: 276 [2022-11-25 23:32:31,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:32:31,811 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 27 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:31,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 766 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2022-11-25 23:32:31,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-25 23:32:31,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 251. [2022-11-25 23:32:31,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 233 states have (on average 1.1974248927038627) internal successors, (279), 238 states have internal predecessors, (279), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 23:32:31,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 306 transitions. [2022-11-25 23:32:31,840 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 306 transitions. Word has length 24 [2022-11-25 23:32:31,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:31,840 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 306 transitions. [2022-11-25 23:32:31,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:32:31,841 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 306 transitions. [2022-11-25 23:32:31,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 23:32:31,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:31,843 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:31,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:32:31,844 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:32:31,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:31,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1076919952, now seen corresponding path program 1 times [2022-11-25 23:32:31,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:31,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255999951] [2022-11-25 23:32:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:31,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:32,079 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:32:32,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509355250] [2022-11-25 23:32:32,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:32,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:32,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:32,087 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:32,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:32:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:32,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 1687 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:32:33,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:32:33,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:32:33,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:33,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255999951] [2022-11-25 23:32:33,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:32:33,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509355250] [2022-11-25 23:32:33,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509355250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:33,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:33,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:32:33,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161157584] [2022-11-25 23:32:33,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:33,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:32:33,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:33,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:32:33,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:32:33,096 INFO L87 Difference]: Start difference. First operand 251 states and 306 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:32:35,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-25 23:32:35,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:35,600 INFO L93 Difference]: Finished difference Result 614 states and 746 transitions. [2022-11-25 23:32:35,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:32:35,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-25 23:32:35,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:35,603 INFO L225 Difference]: With dead ends: 614 [2022-11-25 23:32:35,603 INFO L226 Difference]: Without dead ends: 366 [2022-11-25 23:32:35,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:32:35,606 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 119 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:35,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 547 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-25 23:32:35,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-11-25 23:32:35,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 362. [2022-11-25 23:32:35,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 339 states have (on average 1.1799410029498525) internal successors, (400), 344 states have internal predecessors, (400), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-25 23:32:35,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 437 transitions. [2022-11-25 23:32:35,652 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 437 transitions. Word has length 49 [2022-11-25 23:32:35,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:35,653 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 437 transitions. [2022-11-25 23:32:35,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:32:35,653 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 437 transitions. [2022-11-25 23:32:35,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-25 23:32:35,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:35,656 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:35,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 23:32:35,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-25 23:32:35,857 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:32:35,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:35,857 INFO L85 PathProgramCache]: Analyzing trace with hash -887951383, now seen corresponding path program 1 times [2022-11-25 23:32:35,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:35,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877388834] [2022-11-25 23:32:35,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:35,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:35,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:32:35,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591653467] [2022-11-25 23:32:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:35,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:35,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:35,941 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:35,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:32:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:36,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:32:36,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:36,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:32:36,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:32:36,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:32:36,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 23:32:36,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:32:36,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:32:36,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:36,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877388834] [2022-11-25 23:32:36,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:32:36,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591653467] [2022-11-25 23:32:36,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591653467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:36,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:36,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:32:36,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331528728] [2022-11-25 23:32:36,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:36,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:32:36,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:36,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:32:36,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:32:36,801 INFO L87 Difference]: Start difference. First operand 362 states and 437 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 23:32:38,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-25 23:32:41,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:41,053 INFO L93 Difference]: Finished difference Result 674 states and 815 transitions. [2022-11-25 23:32:41,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:32:41,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 62 [2022-11-25 23:32:41,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:41,056 INFO L225 Difference]: With dead ends: 674 [2022-11-25 23:32:41,056 INFO L226 Difference]: Without dead ends: 362 [2022-11-25 23:32:41,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:32:41,058 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 13 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:41,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 766 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-25 23:32:41,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-11-25 23:32:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 362. [2022-11-25 23:32:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 339 states have (on average 1.176991150442478) internal successors, (399), 344 states have internal predecessors, (399), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-25 23:32:41,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 436 transitions. [2022-11-25 23:32:41,099 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 436 transitions. Word has length 62 [2022-11-25 23:32:41,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:41,101 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 436 transitions. [2022-11-25 23:32:41,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 23:32:41,102 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 436 transitions. [2022-11-25 23:32:41,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-25 23:32:41,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:41,105 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:41,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:32:41,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:41,305 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:32:41,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:41,306 INFO L85 PathProgramCache]: Analyzing trace with hash -685995049, now seen corresponding path program 1 times [2022-11-25 23:32:41,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:41,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880184323] [2022-11-25 23:32:41,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:41,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:41,500 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:32:41,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201507245] [2022-11-25 23:32:41,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:41,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:41,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:41,503 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:41,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:32:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:42,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 2300 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:32:42,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:42,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:32:42,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:32:42,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:42,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880184323] [2022-11-25 23:32:42,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:32:42,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201507245] [2022-11-25 23:32:42,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201507245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:42,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:42,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:32:42,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867218128] [2022-11-25 23:32:42,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:42,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:32:42,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:42,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:32:42,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:32:42,906 INFO L87 Difference]: Start difference. First operand 362 states and 436 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 23:32:45,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-25 23:32:45,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:45,669 INFO L93 Difference]: Finished difference Result 820 states and 988 transitions. [2022-11-25 23:32:45,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:32:45,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 83 [2022-11-25 23:32:45,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:45,673 INFO L225 Difference]: With dead ends: 820 [2022-11-25 23:32:45,673 INFO L226 Difference]: Without dead ends: 484 [2022-11-25 23:32:45,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:32:45,675 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 110 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:45,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 531 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-25 23:32:45,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-11-25 23:32:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 429. [2022-11-25 23:32:45,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 403 states have (on average 1.1687344913151365) internal successors, (471), 408 states have internal predecessors, (471), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-25 23:32:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 514 transitions. [2022-11-25 23:32:45,704 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 514 transitions. Word has length 83 [2022-11-25 23:32:45,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:45,704 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 514 transitions. [2022-11-25 23:32:45,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 23:32:45,705 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 514 transitions. [2022-11-25 23:32:45,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-25 23:32:45,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:45,708 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:45,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:32:45,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:45,928 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:32:45,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:45,929 INFO L85 PathProgramCache]: Analyzing trace with hash -397116236, now seen corresponding path program 1 times [2022-11-25 23:32:45,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:45,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691289929] [2022-11-25 23:32:45,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:45,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:46,048 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:32:46,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492397446] [2022-11-25 23:32:46,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:46,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:46,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:46,053 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:46,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:32:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:47,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:32:47,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 23:32:47,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:32:47,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:47,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691289929] [2022-11-25 23:32:47,369 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:32:47,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492397446] [2022-11-25 23:32:47,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492397446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:47,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:47,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:32:47,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174946214] [2022-11-25 23:32:47,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:47,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:32:47,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:47,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:32:47,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:32:47,372 INFO L87 Difference]: Start difference. First operand 429 states and 514 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:32:50,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-25 23:32:50,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:50,217 INFO L93 Difference]: Finished difference Result 719 states and 867 transitions. [2022-11-25 23:32:50,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:32:50,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 96 [2022-11-25 23:32:50,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:50,220 INFO L225 Difference]: With dead ends: 719 [2022-11-25 23:32:50,220 INFO L226 Difference]: Without dead ends: 351 [2022-11-25 23:32:50,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:32:50,222 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 438 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:50,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 329 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-25 23:32:50,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-25 23:32:50,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2022-11-25 23:32:50,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 330 states have (on average 1.1666666666666667) internal successors, (385), 335 states have internal predecessors, (385), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-25 23:32:50,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 418 transitions. [2022-11-25 23:32:50,246 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 418 transitions. Word has length 96 [2022-11-25 23:32:50,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:50,246 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 418 transitions. [2022-11-25 23:32:50,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:32:50,247 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 418 transitions. [2022-11-25 23:32:50,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-25 23:32:50,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:50,249 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:50,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:32:50,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:50,465 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:32:50,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:50,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2128847042, now seen corresponding path program 1 times [2022-11-25 23:32:50,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:50,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374215605] [2022-11-25 23:32:50,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:50,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:50,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:32:50,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26998327] [2022-11-25 23:32:50,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:50,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:50,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:50,582 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:50,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:33:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:19,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1463 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:33:19,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:33:19,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:33:19,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:19,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374215605] [2022-11-25 23:33:19,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:33:19,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26998327] [2022-11-25 23:33:19,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26998327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:33:19,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:33:19,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:33:19,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383593083] [2022-11-25 23:33:19,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:33:19,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:33:19,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:19,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:33:19,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:33:19,250 INFO L87 Difference]: Start difference. First operand 351 states and 418 transitions. Second operand has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:33:22,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-25 23:33:22,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:22,955 INFO L93 Difference]: Finished difference Result 684 states and 823 transitions. [2022-11-25 23:33:22,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:33:22,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 103 [2022-11-25 23:33:22,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:22,958 INFO L225 Difference]: With dead ends: 684 [2022-11-25 23:33:22,958 INFO L226 Difference]: Without dead ends: 353 [2022-11-25 23:33:22,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:33:22,959 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:22,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 812 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-25 23:33:22,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-25 23:33:22,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2022-11-25 23:33:22,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 331 states have (on average 1.1691842900302114) internal successors, (387), 337 states have internal predecessors, (387), 17 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-25 23:33:22,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 423 transitions. [2022-11-25 23:33:22,983 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 423 transitions. Word has length 103 [2022-11-25 23:33:22,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:22,984 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 423 transitions. [2022-11-25 23:33:22,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:33:22,984 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 423 transitions. [2022-11-25 23:33:22,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-25 23:33:22,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:22,986 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:33:23,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:23,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:23,199 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:33:23,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:23,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1518494194, now seen corresponding path program 1 times [2022-11-25 23:33:23,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:23,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583876979] [2022-11-25 23:33:23,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:23,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:23,319 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:33:23,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97356840] [2022-11-25 23:33:23,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:23,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:23,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:23,321 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:23,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184c639f-1d46-4668-bfd2-a06a47042db8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process