./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/max40-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/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_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/max40-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/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_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/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 a8d5806586012290ae42296af495175d1f0a3275a3232981eda33ec55888f6d2 --- 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 23:23:56,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:23:56,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:23:56,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:23:56,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:23:56,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:23:56,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:23:56,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:23:56,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:23:56,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:23:56,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:23:56,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:23:56,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:23:56,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:23:56,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:23:56,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:23:56,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:23:56,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:23:56,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:23:56,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:23:56,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:23:56,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:23:56,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:23:56,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:23:56,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:23:56,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:23:56,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:23:56,921 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:23:56,921 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:23:56,923 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:23:56,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:23:56,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:23:56,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:23:56,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:23:56,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:23:56,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:23:56,928 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:23:56,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:23:56,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:23:56,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:23:56,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:23:56,931 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:23:56,964 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:23:56,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:23:56,966 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:23:56,966 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:23:56,967 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:23:56,967 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:23:56,967 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:23:56,968 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:23:56,968 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:23:56,968 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:23:56,969 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:23:56,970 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:23:56,970 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:23:56,970 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:23:56,970 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:23:56,971 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:23:56,971 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:23:56,971 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:23:56,972 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:23:56,972 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:23:56,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:23:56,973 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:23:56,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:23:56,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:23:56,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:23:56,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:23:56,974 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:23:56,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:23:56,975 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:23:56,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:23:56,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:23:56,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:23:56,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:23:56,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:23:56,977 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:23:56,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:23:56,977 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:23:56,977 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:23:56,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:23:56,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:23:56,979 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:23:56,979 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_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8d5806586012290ae42296af495175d1f0a3275a3232981eda33ec55888f6d2 [2022-11-25 23:23:57,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:23:57,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:23:57,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:23:57,373 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:23:57,374 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:23:57,376 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/reducercommutativity/max40-1.i [2022-11-25 23:24:00,455 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:24:00,644 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:24:00,644 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/sv-benchmarks/c/reducercommutativity/max40-1.i [2022-11-25 23:24:00,656 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/data/4bb421798/603ccd85d9584231b80f8608b1874c04/FLAG372acd247 [2022-11-25 23:24:00,681 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/data/4bb421798/603ccd85d9584231b80f8608b1874c04 [2022-11-25 23:24:00,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:24:00,690 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:24:00,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:24:00,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:24:00,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:24:00,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:24:00" (1/1) ... [2022-11-25 23:24:00,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67569e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:24:00, skipping insertion in model container [2022-11-25 23:24:00,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:24:00" (1/1) ... [2022-11-25 23:24:00,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:24:00,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:24:00,939 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_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/sv-benchmarks/c/reducercommutativity/max40-1.i[1290,1303] [2022-11-25 23:24:00,956 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:24:00,964 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:24:00,985 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_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/sv-benchmarks/c/reducercommutativity/max40-1.i[1290,1303] [2022-11-25 23:24:00,986 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:24:00,998 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:24:00,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:24:00 WrapperNode [2022-11-25 23:24:00,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:24:01,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:24:01,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:24:01,000 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:24:01,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:24:00" (1/1) ... [2022-11-25 23:24:01,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:24:00" (1/1) ... [2022-11-25 23:24:01,037 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-11-25 23:24:01,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:24:01,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:24:01,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:24:01,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:24:01,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:24:00" (1/1) ... [2022-11-25 23:24:01,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:24:00" (1/1) ... [2022-11-25 23:24:01,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:24:00" (1/1) ... [2022-11-25 23:24:01,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:24:00" (1/1) ... [2022-11-25 23:24:01,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:24:00" (1/1) ... [2022-11-25 23:24:01,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:24:00" (1/1) ... [2022-11-25 23:24:01,065 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:24:00" (1/1) ... [2022-11-25 23:24:01,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:24:00" (1/1) ... [2022-11-25 23:24:01,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:24:01,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:24:01,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:24:01,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:24:01,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:24:00" (1/1) ... [2022-11-25 23:24:01,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:24:01,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:24:01,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:24:01,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:24:01,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:24:01,153 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-11-25 23:24:01,153 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-11-25 23:24:01,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:24:01,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:24:01,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:24:01,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:24:01,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:24:01,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:24:01,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:24:01,234 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:24:01,236 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:24:01,403 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:24:01,461 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:24:01,461 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 23:24:01,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:24:01 BoogieIcfgContainer [2022-11-25 23:24:01,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:24:01,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:24:01,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:24:01,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:24:01,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:24:00" (1/3) ... [2022-11-25 23:24:01,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7920e263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:24:01, skipping insertion in model container [2022-11-25 23:24:01,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:24:00" (2/3) ... [2022-11-25 23:24:01,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7920e263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:24:01, skipping insertion in model container [2022-11-25 23:24:01,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:24:01" (3/3) ... [2022-11-25 23:24:01,476 INFO L112 eAbstractionObserver]: Analyzing ICFG max40-1.i [2022-11-25 23:24:01,499 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:24:01,500 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:24:01,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:24:01,568 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;@2d2f3ddf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:24:01,569 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:24:01,577 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:24:01,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 23:24:01,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:24:01,592 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:24:01,592 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:24:01,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:24:01,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1438378950, now seen corresponding path program 1 times [2022-11-25 23:24:01,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:24:01,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749147986] [2022-11-25 23:24:01,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:24:01,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:24:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:24:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:24:02,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:24:02,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749147986] [2022-11-25 23:24:02,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749147986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:24:02,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:24:02,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:24:02,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489471748] [2022-11-25 23:24:02,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:24:02,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:24:02,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:24:02,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:24:02,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:24:02,054 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 23:24:02,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:24:02,107 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-11-25 23:24:02,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:24:02,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2022-11-25 23:24:02,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:24:02,117 INFO L225 Difference]: With dead ends: 33 [2022-11-25 23:24:02,118 INFO L226 Difference]: Without dead ends: 16 [2022-11-25 23:24:02,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:24:02,125 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:24:02,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:24:02,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-25 23:24:02,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-25 23:24:02,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:24:02,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-25 23:24:02,192 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2022-11-25 23:24:02,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:24:02,193 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-25 23:24:02,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 23:24:02,193 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-25 23:24:02,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 23:24:02,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:24:02,195 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:24:02,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:24:02,196 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:24:02,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:24:02,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1900472846, now seen corresponding path program 1 times [2022-11-25 23:24:02,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:24:02,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986009613] [2022-11-25 23:24:02,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:24:02,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:24:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:24:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:24:02,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:24:02,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986009613] [2022-11-25 23:24:02,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986009613] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:24:02,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167368153] [2022-11-25 23:24:02,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:24:02,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:02,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:24:02,396 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:24:02,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:24:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:24:02,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:24:02,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:24:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:24:02,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:24:02,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167368153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:24:02,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:24:02,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-25 23:24:02,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331335945] [2022-11-25 23:24:02,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:24:02,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:24:02,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:24:02,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:24:02,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:24:02,572 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 23:24:02,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:24:02,597 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-11-25 23:24:02,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:24:02,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-11-25 23:24:02,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:24:02,599 INFO L225 Difference]: With dead ends: 29 [2022-11-25 23:24:02,599 INFO L226 Difference]: Without dead ends: 17 [2022-11-25 23:24:02,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:24:02,602 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:24:02,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:24:02,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-25 23:24:02,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-25 23:24:02,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:24:02,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-25 23:24:02,613 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2022-11-25 23:24:02,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:24:02,614 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-25 23:24:02,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 23:24:02,614 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-25 23:24:02,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 23:24:02,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:24:02,615 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:24:02,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 23:24:02,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:02,828 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:24:02,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:24:02,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1710545452, now seen corresponding path program 1 times [2022-11-25 23:24:02,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:24:02,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906163154] [2022-11-25 23:24:02,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:24:02,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:24:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:24:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 23:24:03,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:24:03,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906163154] [2022-11-25 23:24:03,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906163154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:24:03,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105320685] [2022-11-25 23:24:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:24:03,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:03,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:24:03,022 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:24:03,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:24:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:24:03,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:24:03,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:24:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:24:03,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:24:03,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105320685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:24:03,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:24:03,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-25 23:24:03,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306559116] [2022-11-25 23:24:03,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:24:03,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:24:03,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:24:03,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:24:03,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:24:03,141 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 23:24:03,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:24:03,182 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-11-25 23:24:03,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:24:03,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-25 23:24:03,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:24:03,184 INFO L225 Difference]: With dead ends: 27 [2022-11-25 23:24:03,185 INFO L226 Difference]: Without dead ends: 18 [2022-11-25 23:24:03,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:24:03,187 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:24:03,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:24:03,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-25 23:24:03,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-25 23:24:03,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:24:03,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-11-25 23:24:03,201 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2022-11-25 23:24:03,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:24:03,204 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-11-25 23:24:03,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 23:24:03,205 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-11-25 23:24:03,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 23:24:03,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:24:03,206 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:24:03,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:24:03,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:03,409 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:24:03,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:24:03,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1965911522, now seen corresponding path program 1 times [2022-11-25 23:24:03,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:24:03,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47051349] [2022-11-25 23:24:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:24:03,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:24:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:24:03,536 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 23:24:03,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:24:03,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47051349] [2022-11-25 23:24:03,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47051349] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:24:03,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443001372] [2022-11-25 23:24:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:24:03,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:03,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:24:03,544 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:24:03,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:24:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:24:03,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:24:03,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:24:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 23:24:03,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:24:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 23:24:03,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443001372] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:24:03,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [426914332] [2022-11-25 23:24:03,839 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:24:03,840 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:24:03,847 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:24:03,862 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:24:03,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:24:03,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:04,008 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:24:04,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-25 23:24:04,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:04,068 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:24:04,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 23:24:04,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:04,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:24:04,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:04,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:24:04,279 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:24:04,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-25 23:24:04,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:24:04,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:04,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 23:24:04,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:04,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-25 23:24:04,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:04,939 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-25 23:24:04,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-11-25 23:24:05,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 23:24:05,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:24:05,225 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-11-25 23:24:05,296 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:24:10,467 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 40 |ULTIMATE.start_main_~i~1#1|) (<= 39 |ULTIMATE.start_main_~i~2#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 156 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:24:10,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:24:10,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:24:10,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2022-11-25 23:24:10,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773379225] [2022-11-25 23:24:10,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:24:10,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:24:10,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:24:10,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:24:10,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:24:10,470 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 23:24:10,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:24:10,504 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-25 23:24:10,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:24:10,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2022-11-25 23:24:10,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:24:10,506 INFO L225 Difference]: With dead ends: 36 [2022-11-25 23:24:10,506 INFO L226 Difference]: Without dead ends: 21 [2022-11-25 23:24:10,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:24:10,508 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:24:10,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:24:10,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-25 23:24:10,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-25 23:24:10,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:24:10,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-25 23:24:10,514 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2022-11-25 23:24:10,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:24:10,514 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-25 23:24:10,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 23:24:10,514 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-25 23:24:10,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 23:24:10,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:24:10,516 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:24:10,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:24:10,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:10,722 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:24:10,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:24:10,722 INFO L85 PathProgramCache]: Analyzing trace with hash -275773198, now seen corresponding path program 2 times [2022-11-25 23:24:10,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:24:10,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372114340] [2022-11-25 23:24:10,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:24:10,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:24:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:24:10,830 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 23:24:10,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:24:10,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372114340] [2022-11-25 23:24:10,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372114340] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:24:10,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026446781] [2022-11-25 23:24:10,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:24:10,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:10,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:24:10,833 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:24:10,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:24:10,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:24:10,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:24:10,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:24:10,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:24:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 23:24:10,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:24:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 23:24:11,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026446781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:24:11,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1668095509] [2022-11-25 23:24:11,012 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:24:11,012 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:24:11,013 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:24:11,014 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:24:11,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:24:11,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:11,064 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:24:11,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 23:24:11,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:11,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 23:24:11,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:11,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 23:24:11,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:11,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:11,210 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 23:24:11,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-25 23:24:11,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:24:11,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:11,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 23:24:11,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:11,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:24:11,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-25 23:24:11,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:11,551 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-25 23:24:11,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-25 23:24:11,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 23:24:11,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:24:11,767 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-11-25 23:24:11,828 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:24:14,918 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 40 |ULTIMATE.start_main_~i~1#1|) (<= 39 |ULTIMATE.start_main_~i~2#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (exists ((v_max_~ret~0_BEFORE_RETURN_12 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_12 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_12 4294967296) (+ (- 4294967296) (mod v_max_~ret~0_BEFORE_RETURN_12 4294967296))))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 156 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:24:14,918 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:24:14,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:24:14,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 23:24:14,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324799839] [2022-11-25 23:24:14,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:24:14,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:24:14,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:24:14,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:24:14,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:24:14,920 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:24:14,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:24:14,954 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-11-25 23:24:14,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:24:14,955 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2022-11-25 23:24:14,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:24:14,956 INFO L225 Difference]: With dead ends: 38 [2022-11-25 23:24:14,956 INFO L226 Difference]: Without dead ends: 24 [2022-11-25 23:24:14,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:24:14,958 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:24:14,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:24:14,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-25 23:24:14,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-25 23:24:14,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:24:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-25 23:24:14,964 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2022-11-25 23:24:14,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:24:14,965 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-25 23:24:14,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:24:14,965 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-25 23:24:14,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 23:24:14,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:24:14,967 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:24:14,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:24:15,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:15,173 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:24:15,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:24:15,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1700893048, now seen corresponding path program 3 times [2022-11-25 23:24:15,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:24:15,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214888072] [2022-11-25 23:24:15,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:24:15,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:24:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:24:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-25 23:24:15,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:24:15,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214888072] [2022-11-25 23:24:15,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214888072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:24:15,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347668766] [2022-11-25 23:24:15,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:24:15,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:15,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:24:15,275 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:24:15,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:24:15,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:24:15,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:24:15,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:24:15,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:24:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-25 23:24:15,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:24:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-25 23:24:15,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347668766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:24:15,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [268278029] [2022-11-25 23:24:15,561 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:24:15,562 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:24:15,562 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:24:15,562 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:24:15,562 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:24:15,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:15,599 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:24:15,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 23:24:15,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:15,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 23:24:15,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:15,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:24:15,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:15,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:24:15,709 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:24:15,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-25 23:24:15,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:24:15,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:15,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 23:24:15,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:15,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:24:15,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-25 23:24:15,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:15,996 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-25 23:24:15,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-25 23:24:16,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 23:24:16,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:24:16,189 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-11-25 23:24:16,245 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:24:21,410 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1141#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 40 |ULTIMATE.start_main_~i~1#1|) (<= 39 |ULTIMATE.start_main_~i~2#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (exists ((v_max_~ret~0_BEFORE_RETURN_18 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_18 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_18 4294967296) (+ (mod v_max_~ret~0_BEFORE_RETURN_18 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 156 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:24:21,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:24:21,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:24:21,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2022-11-25 23:24:21,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649608700] [2022-11-25 23:24:21,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:24:21,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 23:24:21,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:24:21,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 23:24:21,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-11-25 23:24:21,415 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 23:24:21,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:24:21,471 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-11-25 23:24:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:24:21,472 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 37 [2022-11-25 23:24:21,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:24:21,473 INFO L225 Difference]: With dead ends: 49 [2022-11-25 23:24:21,473 INFO L226 Difference]: Without dead ends: 31 [2022-11-25 23:24:21,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-11-25 23:24:21,474 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:24:21,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:24:21,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-25 23:24:21,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-25 23:24:21,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:24:21,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-25 23:24:21,481 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2022-11-25 23:24:21,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:24:21,481 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-25 23:24:21,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 23:24:21,482 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-25 23:24:21,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 23:24:21,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:24:21,483 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:24:21,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-25 23:24:21,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 23:24:21,690 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:24:21,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:24:21,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1200915706, now seen corresponding path program 4 times [2022-11-25 23:24:21,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:24:21,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501347450] [2022-11-25 23:24:21,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:24:21,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:24:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:24:22,121 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-25 23:24:22,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:24:22,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501347450] [2022-11-25 23:24:22,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501347450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:24:22,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128419657] [2022-11-25 23:24:22,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:24:22,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:22,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:24:22,124 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:24:22,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:24:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:24:22,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:24:22,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:24:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-25 23:24:22,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:24:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-25 23:24:22,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128419657] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:24:22,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [831629889] [2022-11-25 23:24:22,582 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:24:22,582 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:24:22,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:24:22,583 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:24:22,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:24:22,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:22,611 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:24:22,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-25 23:24:22,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:22,648 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:24:22,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 23:24:22,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:22,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 23:24:22,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:22,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:22,742 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 23:24:22,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-25 23:24:22,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:24:22,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:22,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 23:24:22,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:22,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:24:22,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-25 23:24:23,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:23,023 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-25 23:24:23,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-25 23:24:23,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 23:24:23,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:24:23,184 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-11-25 23:24:23,240 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:24:30,446 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1574#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 40 |ULTIMATE.start_main_~i~1#1|) (<= 39 |ULTIMATE.start_main_~i~2#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 156 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:24:30,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:24:30,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:24:30,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2022-11-25 23:24:30,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7580967] [2022-11-25 23:24:30,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:24:30,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 23:24:30,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:24:30,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 23:24:30,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=1046, Unknown=1, NotChecked=0, Total=1406 [2022-11-25 23:24:30,449 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 23:24:30,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:24:30,519 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2022-11-25 23:24:30,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 23:24:30,520 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2022-11-25 23:24:30,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:24:30,521 INFO L225 Difference]: With dead ends: 62 [2022-11-25 23:24:30,522 INFO L226 Difference]: Without dead ends: 43 [2022-11-25 23:24:30,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=359, Invalid=1046, Unknown=1, NotChecked=0, Total=1406 [2022-11-25 23:24:30,524 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:24:30,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:24:30,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-25 23:24:30,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-25 23:24:30,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:24:30,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-11-25 23:24:30,531 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 44 [2022-11-25 23:24:30,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:24:30,531 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-11-25 23:24:30,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 23:24:30,532 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-11-25 23:24:30,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-25 23:24:30,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:24:30,534 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:24:30,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:24:30,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:30,748 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:24:30,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:24:30,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1459782650, now seen corresponding path program 5 times [2022-11-25 23:24:30,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:24:30,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042994979] [2022-11-25 23:24:30,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:24:30,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:24:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:24:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-25 23:24:31,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:24:31,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042994979] [2022-11-25 23:24:31,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042994979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:24:31,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263869546] [2022-11-25 23:24:31,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:24:31,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:31,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:24:31,637 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:24:31,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:24:31,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:24:31,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:24:31,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:24:31,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:24:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-25 23:24:31,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:24:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-25 23:24:32,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263869546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:24:32,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1723539162] [2022-11-25 23:24:32,021 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:24:32,021 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:24:32,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:24:32,022 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:24:32,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:24:32,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:32,054 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:24:32,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-25 23:24:32,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:32,085 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:24:32,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 23:24:32,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:32,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 23:24:32,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:32,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:32,171 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 23:24:32,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-25 23:24:32,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:24:32,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:32,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 23:24:32,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:32,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-25 23:24:32,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:32,504 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-25 23:24:32,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-11-25 23:24:32,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 23:24:32,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:24:32,702 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-11-25 23:24:32,764 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:24:36,168 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2139#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 40 |ULTIMATE.start_main_~i~1#1|) (<= 39 |ULTIMATE.start_main_~i~2#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 156 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:24:36,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:24:36,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:24:36,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2022-11-25 23:24:36,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842301883] [2022-11-25 23:24:36,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:24:36,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 23:24:36,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:24:36,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 23:24:36,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2022-11-25 23:24:36,172 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:24:36,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:24:36,320 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2022-11-25 23:24:36,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 23:24:36,321 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2022-11-25 23:24:36,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:24:36,325 INFO L225 Difference]: With dead ends: 69 [2022-11-25 23:24:36,325 INFO L226 Difference]: Without dead ends: 50 [2022-11-25 23:24:36,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2022-11-25 23:24:36,327 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:24:36,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:24:36,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-25 23:24:36,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-25 23:24:36,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:24:36,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-11-25 23:24:36,336 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 56 [2022-11-25 23:24:36,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:24:36,337 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-11-25 23:24:36,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:24:36,337 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-11-25 23:24:36,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-25 23:24:36,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:24:36,339 INFO L195 NwaCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:24:36,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:24:36,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:36,546 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:24:36,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:24:36,547 INFO L85 PathProgramCache]: Analyzing trace with hash 619420018, now seen corresponding path program 6 times [2022-11-25 23:24:36,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:24:36,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363849174] [2022-11-25 23:24:36,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:24:36,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:24:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:24:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-25 23:24:37,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:24:37,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363849174] [2022-11-25 23:24:37,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363849174] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:24:37,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348299902] [2022-11-25 23:24:37,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:24:37,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:37,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:24:37,763 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:24:37,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:24:37,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:24:37,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:24:37,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:24:37,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:24:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-25 23:24:38,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:24:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-25 23:24:38,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348299902] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:24:38,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [259589852] [2022-11-25 23:24:38,856 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:24:38,856 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:24:38,857 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:24:38,857 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:24:38,857 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:24:38,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:38,891 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:24:38,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-25 23:24:38,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:38,919 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:24:38,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 23:24:38,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:38,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 23:24:38,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:38,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:39,005 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 23:24:39,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-25 23:24:39,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:24:39,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:39,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 23:24:39,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:39,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-25 23:24:39,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:39,302 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-25 23:24:39,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-11-25 23:24:39,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 23:24:39,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:24:39,499 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-11-25 23:24:39,557 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:24:40,874 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2854#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 40 |ULTIMATE.start_main_~i~1#1|) (<= 39 |ULTIMATE.start_main_~i~2#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 156 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (exists ((v_max_~ret~0_BEFORE_RETURN_35 Int)) (= (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_35 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_35 4294967296) (+ (mod v_max_~ret~0_BEFORE_RETURN_35 4294967296) (- 4294967296))) |ULTIMATE.start_main_~ret5~0#1|)))' at error location [2022-11-25 23:24:40,874 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:24:40,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:24:40,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 43 [2022-11-25 23:24:40,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323813320] [2022-11-25 23:24:40,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:24:40,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 23:24:40,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:24:40,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 23:24:40,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=963, Invalid=2117, Unknown=0, NotChecked=0, Total=3080 [2022-11-25 23:24:40,878 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 43 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 43 states have internal predecessors, (58), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 23:24:41,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:24:41,011 INFO L93 Difference]: Finished difference Result 92 states and 116 transitions. [2022-11-25 23:24:41,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-25 23:24:41,011 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 43 states have internal predecessors, (58), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 75 [2022-11-25 23:24:41,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:24:41,015 INFO L225 Difference]: With dead ends: 92 [2022-11-25 23:24:41,016 INFO L226 Difference]: Without dead ends: 67 [2022-11-25 23:24:41,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 187 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=963, Invalid=2117, Unknown=0, NotChecked=0, Total=3080 [2022-11-25 23:24:41,020 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:24:41,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:24:41,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-25 23:24:41,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-11-25 23:24:41,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:24:41,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-11-25 23:24:41,043 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 75 [2022-11-25 23:24:41,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:24:41,044 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-11-25 23:24:41,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 43 states have internal predecessors, (58), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 23:24:41,044 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-11-25 23:24:41,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-25 23:24:41,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:24:41,052 INFO L195 NwaCegarLoop]: trace histogram [40, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:24:41,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:24:41,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:41,260 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:24:41,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:24:41,260 INFO L85 PathProgramCache]: Analyzing trace with hash 2033523142, now seen corresponding path program 7 times [2022-11-25 23:24:41,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:24:41,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824168946] [2022-11-25 23:24:41,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:24:41,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:24:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:24:41,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2022-11-25 23:24:41,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:24:41,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824168946] [2022-11-25 23:24:41,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824168946] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:24:41,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410818841] [2022-11-25 23:24:41,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:24:41,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:41,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:24:41,886 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:24:41,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:24:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:24:42,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:24:42,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:24:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 244 proven. 55 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2022-11-25 23:24:42,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:24:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2022-11-25 23:24:42,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410818841] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:24:42,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [638011132] [2022-11-25 23:24:42,447 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:24:42,447 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:24:42,447 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:24:42,447 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:24:42,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:24:42,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:42,482 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:24:42,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 23:24:42,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:42,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 23:24:42,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:42,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 23:24:42,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:42,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:42,575 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 23:24:42,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-25 23:24:42,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:24:42,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:42,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 23:24:42,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:42,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:24:42,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-25 23:24:42,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:42,844 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-25 23:24:42,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-25 23:24:42,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 23:24:42,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:24:43,003 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-11-25 23:24:43,055 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:24:46,260 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3733#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 40 |ULTIMATE.start_main_~i~1#1|) (<= 39 |ULTIMATE.start_main_~i~2#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 156 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:24:46,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:24:46,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:24:46,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-25 23:24:46,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774208981] [2022-11-25 23:24:46,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:24:46,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 23:24:46,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:24:46,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 23:24:46,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=1046, Unknown=1, NotChecked=0, Total=1406 [2022-11-25 23:24:46,263 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 23:24:46,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:24:46,338 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2022-11-25 23:24:46,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 23:24:46,338 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 92 [2022-11-25 23:24:46,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:24:46,339 INFO L225 Difference]: With dead ends: 103 [2022-11-25 23:24:46,339 INFO L226 Difference]: Without dead ends: 79 [2022-11-25 23:24:46,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=359, Invalid=1046, Unknown=1, NotChecked=0, Total=1406 [2022-11-25 23:24:46,341 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:24:46,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:24:46,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-25 23:24:46,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-11-25 23:24:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:24:46,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2022-11-25 23:24:46,350 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 92 [2022-11-25 23:24:46,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:24:46,350 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2022-11-25 23:24:46,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 23:24:46,351 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2022-11-25 23:24:46,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-25 23:24:46,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:24:46,353 INFO L195 NwaCegarLoop]: trace histogram [66, 40, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:24:46,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:24:46,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 23:24:46,560 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:24:46,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:24:46,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1318305210, now seen corresponding path program 8 times [2022-11-25 23:24:46,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:24:46,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831453012] [2022-11-25 23:24:46,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:24:46,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:24:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:24:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 0 proven. 1313 refuted. 0 times theorem prover too weak. 1862 trivial. 0 not checked. [2022-11-25 23:24:47,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:24:47,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831453012] [2022-11-25 23:24:47,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831453012] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:24:47,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589316252] [2022-11-25 23:24:47,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:24:47,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:47,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:24:47,859 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:24:47,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 23:24:48,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:24:48,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:24:48,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:24:48,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:24:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 1062 proven. 3 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2022-11-25 23:24:48,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:24:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3172 trivial. 0 not checked. [2022-11-25 23:24:48,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589316252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:24:48,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1298738545] [2022-11-25 23:24:48,244 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:24:48,245 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:24:48,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:24:48,245 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:24:48,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:24:48,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:48,279 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:24:48,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 23:24:48,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:48,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 23:24:48,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:48,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:24:48,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:48,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:24:48,408 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:24:48,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-25 23:24:48,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:24:48,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:48,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 23:24:48,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:48,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:24:48,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-25 23:24:48,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:48,689 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-25 23:24:48,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-25 23:24:48,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 23:24:48,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:24:48,843 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-11-25 23:24:48,898 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:24:52,283 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4880#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 40 |ULTIMATE.start_main_~i~1#1|) (<= 39 |ULTIMATE.start_main_~i~2#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 156 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (exists ((v_max_~ret~0_BEFORE_RETURN_48 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_48 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_48 4294967296) (+ (mod v_max_~ret~0_BEFORE_RETURN_48 4294967296) (- 4294967296))))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:24:52,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:24:52,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:24:52,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 5, 5] total 31 [2022-11-25 23:24:52,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992352773] [2022-11-25 23:24:52,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:24:52,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 23:24:52,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:24:52,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 23:24:52,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=1505, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 23:24:52,287 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 31 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:24:52,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:24:52,348 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2022-11-25 23:24:52,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 23:24:52,349 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 31 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 128 [2022-11-25 23:24:52,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:24:52,350 INFO L225 Difference]: With dead ends: 120 [2022-11-25 23:24:52,350 INFO L226 Difference]: Without dead ends: 84 [2022-11-25 23:24:52,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=387, Invalid=1505, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 23:24:52,352 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:24:52,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:24:52,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-25 23:24:52,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-11-25 23:24:52,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:24:52,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-11-25 23:24:52,362 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 128 [2022-11-25 23:24:52,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:24:52,363 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-11-25 23:24:52,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 31 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:24:52,364 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-11-25 23:24:52,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-25 23:24:52,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:24:52,366 INFO L195 NwaCegarLoop]: trace histogram [69, 40, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:24:52,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-25 23:24:52,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:52,573 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:24:52,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:24:52,573 INFO L85 PathProgramCache]: Analyzing trace with hash 2038215936, now seen corresponding path program 9 times [2022-11-25 23:24:52,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:24:52,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240625632] [2022-11-25 23:24:52,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:24:52,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:24:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:24:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 1973 trivial. 0 not checked. [2022-11-25 23:24:53,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:24:53,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240625632] [2022-11-25 23:24:53,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240625632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:24:53,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732969796] [2022-11-25 23:24:53,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:24:53,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:53,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:24:53,952 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:24:53,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 23:24:54,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:24:54,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:24:54,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:24:54,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:24:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 1154 proven. 276 refuted. 0 times theorem prover too weak. 1973 trivial. 0 not checked. [2022-11-25 23:24:54,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:24:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 1973 trivial. 0 not checked. [2022-11-25 23:24:55,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732969796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:24:55,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1091019608] [2022-11-25 23:24:55,224 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:24:55,224 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:24:55,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:24:55,225 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:24:55,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:24:55,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:55,255 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:24:55,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-25 23:24:55,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:55,287 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:24:55,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 23:24:55,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:55,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:24:55,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:55,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:24:55,381 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:24:55,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-25 23:24:55,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:24:55,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:55,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 23:24:55,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:55,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:24:55,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-25 23:24:55,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:55,674 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-25 23:24:55,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-25 23:24:55,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 23:24:55,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:24:55,849 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-11-25 23:24:55,905 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:24:59,289 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6125#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 40 |ULTIMATE.start_main_~i~1#1|) (<= 39 |ULTIMATE.start_main_~i~2#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 156 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (exists ((v_max_~ret~0_BEFORE_RETURN_54 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_54 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_54 4294967296) (+ (mod v_max_~ret~0_BEFORE_RETURN_54 4294967296) (- 4294967296))))))' at error location [2022-11-25 23:24:59,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:24:59,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:24:59,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 43 [2022-11-25 23:24:59,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16480919] [2022-11-25 23:24:59,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:24:59,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 23:24:59,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:24:59,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 23:24:59,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=963, Invalid=2117, Unknown=0, NotChecked=0, Total=3080 [2022-11-25 23:24:59,293 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 43 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 43 states have internal predecessors, (61), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 23:24:59,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:24:59,390 INFO L93 Difference]: Finished difference Result 142 states and 168 transitions. [2022-11-25 23:24:59,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-25 23:24:59,391 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 43 states have internal predecessors, (61), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-11-25 23:24:59,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:24:59,393 INFO L225 Difference]: With dead ends: 142 [2022-11-25 23:24:59,393 INFO L226 Difference]: Without dead ends: 101 [2022-11-25 23:24:59,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 367 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=963, Invalid=2117, Unknown=0, NotChecked=0, Total=3080 [2022-11-25 23:24:59,398 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:24:59,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:24:59,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-25 23:24:59,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-11-25 23:24:59,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:24:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-11-25 23:24:59,418 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 135 [2022-11-25 23:24:59,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:24:59,421 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-11-25 23:24:59,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 43 states have internal predecessors, (61), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 23:24:59,422 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-11-25 23:24:59,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-11-25 23:24:59,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:24:59,426 INFO L195 NwaCegarLoop]: trace histogram [120, 40, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:24:59,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 23:24:59,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:59,643 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:24:59,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:24:59,643 INFO L85 PathProgramCache]: Analyzing trace with hash 456352646, now seen corresponding path program 10 times [2022-11-25 23:24:59,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:24:59,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976838345] [2022-11-25 23:24:59,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:24:59,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:24:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:25:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8350 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 8329 trivial. 0 not checked. [2022-11-25 23:25:00,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:25:00,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976838345] [2022-11-25 23:25:00,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976838345] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:25:00,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820417081] [2022-11-25 23:25:00,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:25:00,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:25:00,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:25:00,294 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:25:00,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 23:25:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:25:00,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:25:00,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:25:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8350 backedges. 3366 proven. 21 refuted. 0 times theorem prover too weak. 4963 trivial. 0 not checked. [2022-11-25 23:25:00,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:25:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8350 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 8329 trivial. 0 not checked. [2022-11-25 23:25:00,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820417081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:25:00,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1243382435] [2022-11-25 23:25:00,896 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:25:00,896 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:25:00,897 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:25:00,897 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:25:00,897 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:25:00,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:00,927 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:25:00,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-25 23:25:00,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:00,958 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:25:00,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 23:25:00,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:00,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 23:25:01,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:01,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:01,039 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 23:25:01,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-25 23:25:01,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:25:01,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:01,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 23:25:01,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:01,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-25 23:25:01,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:01,332 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-25 23:25:01,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-25 23:25:01,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 23:25:01,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:25:01,509 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-11-25 23:25:01,569 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:25:06,616 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7728#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 40 |ULTIMATE.start_main_~i~1#1|) (<= 39 |ULTIMATE.start_main_~i~2#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 156 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:25:06,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:25:06,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:25:06,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-25 23:25:06,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562287900] [2022-11-25 23:25:06,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:25:06,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 23:25:06,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:25:06,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 23:25:06,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=674, Unknown=1, NotChecked=0, Total=870 [2022-11-25 23:25:06,619 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:25:06,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:25:06,689 INFO L93 Difference]: Finished difference Result 157 states and 169 transitions. [2022-11-25 23:25:06,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 23:25:06,690 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 186 [2022-11-25 23:25:06,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:25:06,691 INFO L225 Difference]: With dead ends: 157 [2022-11-25 23:25:06,691 INFO L226 Difference]: Without dead ends: 109 [2022-11-25 23:25:06,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=195, Invalid=674, Unknown=1, NotChecked=0, Total=870 [2022-11-25 23:25:06,693 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:25:06,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:25:06,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-25 23:25:06,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-11-25 23:25:06,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:25:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2022-11-25 23:25:06,703 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 186 [2022-11-25 23:25:06,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:25:06,704 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2022-11-25 23:25:06,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:25:06,704 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2022-11-25 23:25:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-25 23:25:06,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:25:06,707 INFO L195 NwaCegarLoop]: trace histogram [120, 40, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:25:06,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 23:25:06,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 23:25:06,908 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:25:06,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:25:06,908 INFO L85 PathProgramCache]: Analyzing trace with hash 2016795782, now seen corresponding path program 11 times [2022-11-25 23:25:06,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:25:06,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066453622] [2022-11-25 23:25:06,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:25:06,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:25:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:25:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8434 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 8329 trivial. 0 not checked. [2022-11-25 23:25:08,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:25:08,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066453622] [2022-11-25 23:25:08,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066453622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:25:08,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957167037] [2022-11-25 23:25:08,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:25:08,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:25:08,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:25:08,252 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:25:08,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 23:25:11,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-25 23:25:11,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:25:11,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:25:11,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:25:11,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8434 backedges. 3366 proven. 105 refuted. 0 times theorem prover too weak. 4963 trivial. 0 not checked. [2022-11-25 23:25:11,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:25:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8434 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 8329 trivial. 0 not checked. [2022-11-25 23:25:11,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957167037] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:25:11,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [398571775] [2022-11-25 23:25:11,713 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:25:11,713 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:25:11,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:25:11,714 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:25:11,714 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:25:11,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:11,746 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:25:11,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-25 23:25:11,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:11,791 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:25:11,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 23:25:11,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:11,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 23:25:11,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:11,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:11,875 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 23:25:11,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-25 23:25:11,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:25:11,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:11,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 23:25:12,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:12,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-25 23:25:12,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:12,114 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-25 23:25:12,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-25 23:25:12,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 23:25:12,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:25:12,274 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-11-25 23:25:12,324 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:25:13,436 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9443#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 40 |ULTIMATE.start_main_~i~1#1|) (<= 39 |ULTIMATE.start_main_~i~2#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 156 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (exists ((v_max_~ret~0_BEFORE_RETURN_65 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_65 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_65 4294967296) (+ (mod v_max_~ret~0_BEFORE_RETURN_65 4294967296) (- 4294967296))))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:25:13,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:25:13,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:25:13,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-11-25 23:25:13,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182683736] [2022-11-25 23:25:13,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:25:13,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 23:25:13,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:25:13,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 23:25:13,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=588, Invalid=1482, Unknown=0, NotChecked=0, Total=2070 [2022-11-25 23:25:13,440 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:25:13,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:25:13,529 INFO L93 Difference]: Finished difference Result 173 states and 193 transitions. [2022-11-25 23:25:13,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 23:25:13,530 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 194 [2022-11-25 23:25:13,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:25:13,533 INFO L225 Difference]: With dead ends: 173 [2022-11-25 23:25:13,533 INFO L226 Difference]: Without dead ends: 125 [2022-11-25 23:25:13,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=588, Invalid=1482, Unknown=0, NotChecked=0, Total=2070 [2022-11-25 23:25:13,538 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:25:13,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:25:13,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-25 23:25:13,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-11-25 23:25:13,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:25:13,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2022-11-25 23:25:13,549 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 194 [2022-11-25 23:25:13,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:25:13,550 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2022-11-25 23:25:13,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:25:13,550 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2022-11-25 23:25:13,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-11-25 23:25:13,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:25:13,554 INFO L195 NwaCegarLoop]: trace histogram [120, 40, 30, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:25:13,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-25 23:25:13,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:25:13,764 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:25:13,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:25:13,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1855966854, now seen corresponding path program 12 times [2022-11-25 23:25:13,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:25:13,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843061781] [2022-11-25 23:25:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:25:13,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:25:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:25:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 8329 trivial. 0 not checked. [2022-11-25 23:25:16,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:25:16,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843061781] [2022-11-25 23:25:16,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843061781] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:25:16,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090673107] [2022-11-25 23:25:16,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:25:16,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:25:16,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:25:16,260 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:25:16,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 23:25:16,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:25:16,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:25:16,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 23:25:16,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:25:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 3366 proven. 465 refuted. 0 times theorem prover too weak. 4963 trivial. 0 not checked. [2022-11-25 23:25:16,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:25:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 8329 trivial. 0 not checked. [2022-11-25 23:25:17,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090673107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:25:17,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [87433699] [2022-11-25 23:25:17,779 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:25:17,779 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:25:17,780 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:25:17,780 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:25:17,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:25:17,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:17,809 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:25:17,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-25 23:25:17,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:17,841 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:25:17,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 23:25:17,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:17,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 23:25:17,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:17,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:17,938 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 23:25:17,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-25 23:25:17,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:25:18,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:18,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 23:25:18,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:18,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-25 23:25:18,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:18,196 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-25 23:25:18,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-25 23:25:18,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 23:25:18,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:25:18,359 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-11-25 23:25:18,405 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:25:23,803 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11327#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 40 |ULTIMATE.start_main_~i~1#1|) (<= 39 |ULTIMATE.start_main_~i~2#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 156 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:25:23,803 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:25:23,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:25:23,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 42 [2022-11-25 23:25:23,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536530670] [2022-11-25 23:25:23,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:25:23,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-25 23:25:23,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:25:23,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-25 23:25:23,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=920, Invalid=2049, Unknown=1, NotChecked=0, Total=2970 [2022-11-25 23:25:23,807 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 42 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:25:23,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:25:23,894 INFO L93 Difference]: Finished difference Result 182 states and 195 transitions. [2022-11-25 23:25:23,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-25 23:25:23,895 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 210 [2022-11-25 23:25:23,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:25:23,896 INFO L225 Difference]: With dead ends: 182 [2022-11-25 23:25:23,896 INFO L226 Difference]: Without dead ends: 134 [2022-11-25 23:25:23,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 585 SyntacticMatches, 23 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=920, Invalid=2049, Unknown=1, NotChecked=0, Total=2970 [2022-11-25 23:25:23,898 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:25:23,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:25:23,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-25 23:25:23,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-11-25 23:25:23,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:25:23,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2022-11-25 23:25:23,907 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 210 [2022-11-25 23:25:23,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:25:23,908 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2022-11-25 23:25:23,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:25:23,908 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2022-11-25 23:25:23,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-11-25 23:25:23,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:25:23,911 INFO L195 NwaCegarLoop]: trace histogram [120, 40, 39, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:25:23,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 23:25:24,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82522aad-2cee-4754-ae9c-38c8fdc4e1d6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 23:25:24,120 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:25:24,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:25:24,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1993008328, now seen corresponding path program 13 times [2022-11-25 23:25:24,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:25:24,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231225667] [2022-11-25 23:25:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:25:24,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms