./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 11:09:56,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:09:56,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:09:56,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:09:56,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:09:56,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:09:56,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:09:56,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:09:56,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:09:56,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:09:56,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:09:56,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:09:56,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:09:56,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:09:56,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:09:56,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:09:56,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:09:56,870 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:09:56,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:09:56,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:09:56,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:09:56,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:09:56,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:09:56,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:09:56,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:09:56,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:09:56,878 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:09:56,879 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:09:56,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:09:56,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:09:56,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:09:56,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:09:56,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:09:56,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:09:56,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:09:56,882 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:09:56,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:09:56,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:09:56,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:09:56,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:09:56,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:09:56,885 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:09:56,904 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:09:56,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:09:56,905 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:09:56,905 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:09:56,906 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:09:56,906 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:09:56,906 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:09:56,906 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:09:56,906 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:09:56,906 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:09:56,907 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:09:56,907 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:09:56,907 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:09:56,907 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:09:56,907 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:09:56,907 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:09:56,908 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:09:56,908 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:09:56,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:09:56,908 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:09:56,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:09:56,909 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:09:56,909 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:09:56,909 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:09:56,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:09:56,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:09:56,909 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:09:56,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:09:56,910 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:09:56,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:09:56,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:09:56,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:09:56,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:09:56,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:09:56,911 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:09:56,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:09:56,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:09:56,911 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:09:56,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:09:56,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:09:56,912 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:09:56,912 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_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 [2022-12-14 11:09:57,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:09:57,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:09:57,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:09:57,097 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:09:57,097 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:09:57,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2022-12-14 11:09:59,690 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:09:59,830 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:09:59,830 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2022-12-14 11:09:59,835 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/data/595242739/700303c931544ea7a1e7afdcad7cc569/FLAG217036a00 [2022-12-14 11:09:59,848 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/data/595242739/700303c931544ea7a1e7afdcad7cc569 [2022-12-14 11:09:59,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:09:59,852 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:09:59,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:09:59,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:09:59,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:09:59,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:09:59" (1/1) ... [2022-12-14 11:09:59,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31c2a0c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:09:59, skipping insertion in model container [2022-12-14 11:09:59,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:09:59" (1/1) ... [2022-12-14 11:09:59,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:09:59,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:10:00,006 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_1c2fb386-f869-4742-96d3-f98d94e779f8/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2022-12-14 11:10:00,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:10:00,029 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:10:00,040 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_1c2fb386-f869-4742-96d3-f98d94e779f8/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2022-12-14 11:10:00,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:10:00,059 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:10:00,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:10:00 WrapperNode [2022-12-14 11:10:00,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:10:00,060 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:10:00,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:10:00,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:10:00,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:10:00" (1/1) ... [2022-12-14 11:10:00,071 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:10:00" (1/1) ... [2022-12-14 11:10:00,084 INFO L138 Inliner]: procedures = 15, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2022-12-14 11:10:00,084 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:10:00,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:10:00,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:10:00,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:10:00,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:10:00" (1/1) ... [2022-12-14 11:10:00,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:10:00" (1/1) ... [2022-12-14 11:10:00,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:10:00" (1/1) ... [2022-12-14 11:10:00,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:10:00" (1/1) ... [2022-12-14 11:10:00,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:10:00" (1/1) ... [2022-12-14 11:10:00,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:10:00" (1/1) ... [2022-12-14 11:10:00,100 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:10:00" (1/1) ... [2022-12-14 11:10:00,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:10:00" (1/1) ... [2022-12-14 11:10:00,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:10:00,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:10:00,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:10:00,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:10:00,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:10:00" (1/1) ... [2022-12-14 11:10:00,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:10:00,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:10:00,126 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:10:00,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:10:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:10:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 11:10:00,158 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 11:10:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:10:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 11:10:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 11:10:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:10:00,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:10:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 11:10:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 11:10:00,214 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:10:00,215 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:10:00,324 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:10:00,353 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:10:00,353 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 11:10:00,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:10:00 BoogieIcfgContainer [2022-12-14 11:10:00,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:10:00,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:10:00,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:10:00,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:10:00,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:09:59" (1/3) ... [2022-12-14 11:10:00,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb6a82f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:10:00, skipping insertion in model container [2022-12-14 11:10:00,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:10:00" (2/3) ... [2022-12-14 11:10:00,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb6a82f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:10:00, skipping insertion in model container [2022-12-14 11:10:00,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:10:00" (3/3) ... [2022-12-14 11:10:00,362 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr2.c [2022-12-14 11:10:00,376 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:10:00,376 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:10:00,410 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:10:00,415 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;@69705dce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:10:00,415 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:10:00,418 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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) [2022-12-14 11:10:00,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 11:10:00,426 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:10:00,426 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 11:10:00,426 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:10:00,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:10:00,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1033138693, now seen corresponding path program 1 times [2022-12-14 11:10:00,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:10:00,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419947726] [2022-12-14 11:10:00,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:10:00,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:10:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:10:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:10:00,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:10:00,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419947726] [2022-12-14 11:10:00,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419947726] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:10:00,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:10:00,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:10:00,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919531186] [2022-12-14 11:10:00,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:10:00,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:10:00,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:10:00,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:10:00,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:10:00,658 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:10:00,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:10:00,705 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2022-12-14 11:10:00,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:10:00,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 11:10:00,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:10:00,714 INFO L225 Difference]: With dead ends: 27 [2022-12-14 11:10:00,715 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 11:10:00,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:10:00,720 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:10:00,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:10:00,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 11:10:00,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2022-12-14 11:10:00,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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) [2022-12-14 11:10:00,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-12-14 11:10:00,753 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 6 [2022-12-14 11:10:00,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:10:00,754 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-12-14 11:10:00,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:10:00,754 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-12-14 11:10:00,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 11:10:00,755 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:10:00,755 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:10:00,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:10:00,756 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:10:00,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:10:00,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1201809854, now seen corresponding path program 1 times [2022-12-14 11:10:00,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:10:00,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903822287] [2022-12-14 11:10:00,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:10:00,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:10:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:10:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 11:10:00,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:10:00,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903822287] [2022-12-14 11:10:00,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903822287] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:10:00,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:10:00,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:10:00,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408023755] [2022-12-14 11:10:00,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:10:00,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:10:00,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:10:00,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:10:00,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:10:00,874 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-12-14 11:10:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:10:00,917 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2022-12-14 11:10:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:10:00,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 17 [2022-12-14 11:10:00,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:10:00,918 INFO L225 Difference]: With dead ends: 25 [2022-12-14 11:10:00,918 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 11:10:00,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:10:00,920 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:10:00,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 12 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:10:00,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 11:10:00,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2022-12-14 11:10:00,925 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) [2022-12-14 11:10:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-12-14 11:10:00,926 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 17 [2022-12-14 11:10:00,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:10:00,927 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-12-14 11:10:00,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-12-14 11:10:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-12-14 11:10:00,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 11:10:00,927 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:10:00,928 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:10:00,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 11:10:00,928 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:10:00,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:10:00,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1407331851, now seen corresponding path program 1 times [2022-12-14 11:10:00,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:10:00,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470746681] [2022-12-14 11:10:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:10:00,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:10:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:10:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 11:10:01,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:10:01,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470746681] [2022-12-14 11:10:01,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470746681] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:10:01,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121033239] [2022-12-14 11:10:01,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:10:01,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:10:01,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:10:01,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:10:01,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:10:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:10:01,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:10:01,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:10:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 11:10:01,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:10:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 11:10:01,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121033239] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:10:01,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [680823944] [2022-12-14 11:10:01,217 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 11:10:01,217 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:10:01,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:10:01,227 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:10:01,227 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:10:01,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:01,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:01,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:01,403 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-12-14 11:10:01,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-12-14 11:10:01,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:01,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:01,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:01,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-12-14 11:10:01,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:01,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:01,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:01,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 11:10:03,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:03,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:03,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:03,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:03,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:04,045 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 11:10:04,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 573 treesize of output 539 [2022-12-14 11:10:06,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:06,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:06,795 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 11:10:06,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 11:10:06,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:06,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:06,942 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 11:10:06,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 11:10:06,999 INFO L321 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-12-14 11:10:07,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 40 [2022-12-14 11:10:07,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:07,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:07,050 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 11:10:07,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-12-14 11:10:07,118 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2022-12-14 11:10:07,119 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:10:07,469 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '262#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 11:10:07,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:10:07,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:10:07,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-12-14 11:10:07,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804268968] [2022-12-14 11:10:07,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:10:07,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 11:10:07,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:10:07,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 11:10:07,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2022-12-14 11:10:07,471 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 11:10:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:10:07,574 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2022-12-14 11:10:07,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:10:07,574 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 18 [2022-12-14 11:10:07,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:10:07,575 INFO L225 Difference]: With dead ends: 52 [2022-12-14 11:10:07,575 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 11:10:07,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2022-12-14 11:10:07,576 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:10:07,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 18 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:10:07,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 11:10:07,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2022-12-14 11:10:07,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 11:10:07,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 47 transitions. [2022-12-14 11:10:07,582 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 47 transitions. Word has length 18 [2022-12-14 11:10:07,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:10:07,582 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 47 transitions. [2022-12-14 11:10:07,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 11:10:07,582 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 47 transitions. [2022-12-14 11:10:07,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 11:10:07,583 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:10:07,583 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 11:10:07,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:10:07,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:10:07,785 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:10:07,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:10:07,787 INFO L85 PathProgramCache]: Analyzing trace with hash 2143827323, now seen corresponding path program 2 times [2022-12-14 11:10:07,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:10:07,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634239735] [2022-12-14 11:10:07,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:10:07,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:10:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:10:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-12-14 11:10:08,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:10:08,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634239735] [2022-12-14 11:10:08,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634239735] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:10:08,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845847936] [2022-12-14 11:10:08,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:10:08,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:10:08,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:10:08,057 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:10:08,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:10:08,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 11:10:08,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:10:08,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 11:10:08,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:10:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-12-14 11:10:08,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:10:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-12-14 11:10:08,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845847936] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:10:08,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1142804771] [2022-12-14 11:10:08,303 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 11:10:08,303 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:10:08,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:10:08,303 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:10:08,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:10:08,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:08,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:08,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:08,375 INFO L321 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2022-12-14 11:10:08,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 72 [2022-12-14 11:10:08,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:08,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:08,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:08,452 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-12-14 11:10:08,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-12-14 11:10:08,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:08,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:08,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:08,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 11:10:10,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:10,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:10,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:10,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:10,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:10,401 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 11:10:10,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 573 treesize of output 539 [2022-12-14 11:10:12,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:12,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:12,674 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 11:10:12,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 11:10:12,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:12,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:12,802 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 11:10:12,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 11:10:12,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:12,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:12,857 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 11:10:12,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-12-14 11:10:12,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:12,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:12,905 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 11:10:12,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-12-14 11:10:12,973 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2022-12-14 11:10:12,974 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:10:13,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '753#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 11:10:13,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:10:13,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:10:13,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 19 [2022-12-14 11:10:13,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48322047] [2022-12-14 11:10:13,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:10:13,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 11:10:13,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:10:13,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 11:10:13,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2022-12-14 11:10:13,406 INFO L87 Difference]: Start difference. First operand 34 states and 47 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-12-14 11:10:13,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:10:13,631 INFO L93 Difference]: Finished difference Result 121 states and 165 transitions. [2022-12-14 11:10:13,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 11:10:13,632 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 54 [2022-12-14 11:10:13,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:10:13,633 INFO L225 Difference]: With dead ends: 121 [2022-12-14 11:10:13,633 INFO L226 Difference]: Without dead ends: 111 [2022-12-14 11:10:13,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 11:10:13,635 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 189 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:10:13,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 42 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:10:13,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-12-14 11:10:13,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 70. [2022-12-14 11:10:13,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-14 11:10:13,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 101 transitions. [2022-12-14 11:10:13,652 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 101 transitions. Word has length 54 [2022-12-14 11:10:13,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:10:13,652 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 101 transitions. [2022-12-14 11:10:13,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-12-14 11:10:13,652 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 101 transitions. [2022-12-14 11:10:13,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 11:10:13,655 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:10:13,655 INFO L195 NwaCegarLoop]: trace histogram [30, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-12-14 11:10:13,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 11:10:13,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:10:13,857 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:10:13,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:10:13,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1580456123, now seen corresponding path program 3 times [2022-12-14 11:10:13,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:10:13,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025213882] [2022-12-14 11:10:13,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:10:13,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:10:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:10:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2022-12-14 11:10:14,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:10:14,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025213882] [2022-12-14 11:10:14,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025213882] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:10:14,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395255519] [2022-12-14 11:10:14,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:10:14,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:10:14,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:10:14,328 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:10:14,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:10:15,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:10:15,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:10:15,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 11:10:15,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:10:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2022-12-14 11:10:16,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:10:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2022-12-14 11:10:16,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395255519] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:10:16,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1372045540] [2022-12-14 11:10:16,277 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 11:10:16,277 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:10:16,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:10:16,277 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:10:16,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:10:16,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:16,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:16,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:16,360 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-12-14 11:10:16,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-12-14 11:10:16,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:16,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:16,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:16,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-12-14 11:10:16,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:16,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:16,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:16,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-12-14 11:10:18,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:18,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:18,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:18,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:18,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:18,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:18,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:18,323 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 11:10:18,323 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 7 case distinctions, treesize of input 623 treesize of output 537 [2022-12-14 11:10:19,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:19,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:19,247 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 11:10:19,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 11:10:19,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:19,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:19,725 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 11:10:19,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 11:10:19,784 INFO L321 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-12-14 11:10:19,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 40 [2022-12-14 11:10:19,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:19,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:19,831 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 11:10:19,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-12-14 11:10:19,999 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2022-12-14 11:10:20,008 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:10:20,548 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1873#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 11:10:20,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:10:20,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:10:20,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2022-12-14 11:10:20,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341016406] [2022-12-14 11:10:20,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:10:20,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 11:10:20,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:10:20,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 11:10:20,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=1359, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 11:10:20,551 INFO L87 Difference]: Start difference. First operand 70 states and 101 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) [2022-12-14 11:10:21,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:10:21,078 INFO L93 Difference]: Finished difference Result 259 states and 351 transitions. [2022-12-14 11:10:21,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 11:10:21,079 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) Word has length 126 [2022-12-14 11:10:21,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:10:21,083 INFO L225 Difference]: With dead ends: 259 [2022-12-14 11:10:21,083 INFO L226 Difference]: Without dead ends: 243 [2022-12-14 11:10:21,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 334 SyntacticMatches, 11 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1031, Invalid=2161, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 11:10:21,084 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 450 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:10:21,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 84 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:10:21,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-12-14 11:10:21,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 142. [2022-12-14 11:10:21,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-12-14 11:10:21,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 209 transitions. [2022-12-14 11:10:21,100 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 209 transitions. Word has length 126 [2022-12-14 11:10:21,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:10:21,100 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 209 transitions. [2022-12-14 11:10:21,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) [2022-12-14 11:10:21,101 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 209 transitions. [2022-12-14 11:10:21,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-12-14 11:10:21,104 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:10:21,104 INFO L195 NwaCegarLoop]: trace histogram [66, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2022-12-14 11:10:21,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 11:10:21,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:10:21,305 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:10:21,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:10:21,307 INFO L85 PathProgramCache]: Analyzing trace with hash 81571643, now seen corresponding path program 4 times [2022-12-14 11:10:21,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:10:21,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981402968] [2022-12-14 11:10:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:10:21,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:10:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:10:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2022-12-14 11:10:22,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:10:22,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981402968] [2022-12-14 11:10:22,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981402968] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:10:22,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165558317] [2022-12-14 11:10:22,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:10:22,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:10:22,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:10:22,321 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:10:22,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:10:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:10:22,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 11:10:22,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:10:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2022-12-14 11:10:23,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:10:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2022-12-14 11:10:23,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165558317] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:10:23,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [622194055] [2022-12-14 11:10:23,705 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 11:10:23,705 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:10:23,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:10:23,705 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:10:23,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:10:23,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:23,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:23,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:23,774 INFO L321 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2022-12-14 11:10:23,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 72 [2022-12-14 11:10:23,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:23,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:23,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:23,848 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-12-14 11:10:23,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-12-14 11:10:24,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:24,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:24,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:24,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 11:10:25,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:25,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:25,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:25,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:25,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:25,698 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 11:10:25,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 573 treesize of output 539 [2022-12-14 11:10:29,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:29,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:29,226 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 11:10:29,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 11:10:29,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:29,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:29,710 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 11:10:29,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 11:10:29,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:29,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:29,761 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 11:10:29,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-12-14 11:10:29,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:29,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:10:29,815 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 11:10:29,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-12-14 11:10:29,959 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2022-12-14 11:10:29,966 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:10:31,001 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4253#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 11:10:31,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:10:31,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:10:31,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2022-12-14 11:10:31,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042455208] [2022-12-14 11:10:31,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:10:31,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-12-14 11:10:31,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:10:31,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-12-14 11:10:31,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2535, Invalid=4107, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 11:10:31,007 INFO L87 Difference]: Start difference. First operand 142 states and 209 transitions. Second operand has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) [2022-12-14 11:10:32,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:10:32,552 INFO L93 Difference]: Finished difference Result 535 states and 723 transitions. [2022-12-14 11:10:32,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 11:10:32,552 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) Word has length 270 [2022-12-14 11:10:32,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:10:32,556 INFO L225 Difference]: With dead ends: 535 [2022-12-14 11:10:32,556 INFO L226 Difference]: Without dead ends: 507 [2022-12-14 11:10:32,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 730 SyntacticMatches, 23 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7352 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3755, Invalid=7165, Unknown=0, NotChecked=0, Total=10920 [2022-12-14 11:10:32,560 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1072 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:10:32,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1075 Valid, 174 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 11:10:32,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-12-14 11:10:32,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 286. [2022-12-14 11:10:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 138 states have call successors, (138), 1 states have call predecessors, (138), 1 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2022-12-14 11:10:32,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 425 transitions. [2022-12-14 11:10:32,598 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 425 transitions. Word has length 270 [2022-12-14 11:10:32,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:10:32,599 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 425 transitions. [2022-12-14 11:10:32,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) [2022-12-14 11:10:32,600 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 425 transitions. [2022-12-14 11:10:32,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2022-12-14 11:10:32,613 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:10:32,613 INFO L195 NwaCegarLoop]: trace histogram [138, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2022-12-14 11:10:32,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 11:10:32,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 11:10:32,815 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:10:32,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:10:32,816 INFO L85 PathProgramCache]: Analyzing trace with hash -117138373, now seen corresponding path program 5 times [2022-12-14 11:10:32,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:10:32,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42260263] [2022-12-14 11:10:32,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:10:32,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:10:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:10:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 19987 trivial. 0 not checked. [2022-12-14 11:10:36,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:10:36,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42260263] [2022-12-14 11:10:36,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42260263] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:10:36,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035854661] [2022-12-14 11:10:36,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:10:36,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:10:36,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:10:36,076 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:10:36,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:12:11,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-12-14 11:12:11,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:12:11,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-14 11:12:11,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:12:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 226 proven. 1081 refuted. 0 times theorem prover too weak. 23901 trivial. 0 not checked. [2022-12-14 11:12:12,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:12:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 23856 trivial. 0 not checked. [2022-12-14 11:12:15,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035854661] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:12:15,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1507091196] [2022-12-14 11:12:15,179 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 11:12:15,179 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:12:15,180 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:12:15,180 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:12:15,180 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:12:15,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:12:15,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:12:15,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:12:15,242 INFO L321 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2022-12-14 11:12:15,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 72 [2022-12-14 11:12:15,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:12:15,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:12:15,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:12:15,320 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-12-14 11:12:15,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-12-14 11:12:15,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:12:15,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:12:15,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:12:15,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 11:12:17,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:12:17,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:12:17,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:12:17,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:12:17,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:12:17,273 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 11:12:17,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 573 treesize of output 539 [2022-12-14 11:12:19,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:12:19,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:12:19,598 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 11:12:19,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 11:12:19,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:12:19,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:12:19,768 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 11:12:19,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 11:12:19,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:12:19,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:12:19,827 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 11:12:19,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-12-14 11:12:19,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:12:19,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:12:19,885 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 11:12:19,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-12-14 11:12:19,954 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2022-12-14 11:12:19,955 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:12:22,033 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9159#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 11:12:22,033 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:12:22,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:12:22,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 51, 53] total 150 [2022-12-14 11:12:22,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319320447] [2022-12-14 11:12:22,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:12:22,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-12-14 11:12:22,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:12:22,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-12-14 11:12:22,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10283, Invalid=15157, Unknown=0, NotChecked=0, Total=25440 [2022-12-14 11:12:22,040 INFO L87 Difference]: Start difference. First operand 286 states and 425 transitions. Second operand has 150 states, 150 states have (on average 1.3866666666666667) internal successors, (208), 150 states have internal predecessors, (208), 50 states have call successors, (150), 2 states have call predecessors, (150), 2 states have return successors, (150), 50 states have call predecessors, (150), 50 states have call successors, (150) [2022-12-14 11:12:28,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:12:28,873 INFO L93 Difference]: Finished difference Result 1087 states and 1467 transitions. [2022-12-14 11:12:28,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-12-14 11:12:28,874 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.3866666666666667) internal successors, (208), 150 states have internal predecessors, (208), 50 states have call successors, (150), 2 states have call predecessors, (150), 2 states have return successors, (150), 50 states have call predecessors, (150), 50 states have call successors, (150) Word has length 558 [2022-12-14 11:12:28,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:12:28,877 INFO L225 Difference]: With dead ends: 1087 [2022-12-14 11:12:28,877 INFO L226 Difference]: Without dead ends: 1035 [2022-12-14 11:12:28,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1767 GetRequests, 1516 SyntacticMatches, 47 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29021 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=15205, Invalid=27025, Unknown=0, NotChecked=0, Total=42230 [2022-12-14 11:12:28,883 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2522 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 2298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2660 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 4987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2298 IncrementalHoareTripleChecker+Valid, 2689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:12:28,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2660 Valid, 375 Invalid, 4987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2298 Valid, 2689 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 11:12:28,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-12-14 11:12:28,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 574. [2022-12-14 11:12:28,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 290 states have (on average 1.0103448275862068) internal successors, (293), 290 states have internal predecessors, (293), 282 states have call successors, (282), 1 states have call predecessors, (282), 1 states have return successors, (282), 282 states have call predecessors, (282), 282 states have call successors, (282) [2022-12-14 11:12:28,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 857 transitions. [2022-12-14 11:12:28,922 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 857 transitions. Word has length 558 [2022-12-14 11:12:28,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:12:28,923 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 857 transitions. [2022-12-14 11:12:28,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 1.3866666666666667) internal successors, (208), 150 states have internal predecessors, (208), 50 states have call successors, (150), 2 states have call predecessors, (150), 2 states have return successors, (150), 50 states have call predecessors, (150), 50 states have call successors, (150) [2022-12-14 11:12:28,923 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 857 transitions. [2022-12-14 11:12:28,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1135 [2022-12-14 11:12:28,953 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:12:28,953 INFO L195 NwaCegarLoop]: trace histogram [282, 94, 94, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1] [2022-12-14 11:12:28,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 11:12:29,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 11:12:29,154 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:12:29,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:12:29,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1361933883, now seen corresponding path program 6 times [2022-12-14 11:12:29,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:12:29,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520396987] [2022-12-14 11:12:29,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:12:29,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:12:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:12:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 105656 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 83707 trivial. 0 not checked. [2022-12-14 11:12:45,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:12:45,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520396987] [2022-12-14 11:12:45,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520396987] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:12:45,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440999513] [2022-12-14 11:12:45,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:12:45,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:12:45,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:12:45,431 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:12:45,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c2fb386-f869-4742-96d3-f98d94e779f8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process