./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy3_ground-2.i --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_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/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_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy3_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/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_8868f9ba-3831-4907-b12d-c719c1409cca/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 217f19c8e5e57d916627a12a8c23c5343b3d451054ddc6d3d6dc70e40dff121a --- 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 06:18:08,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:18:08,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:18:08,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:18:08,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:18:08,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:18:08,809 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:18:08,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:18:08,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:18:08,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:18:08,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:18:08,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:18:08,815 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:18:08,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:18:08,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:18:08,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:18:08,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:18:08,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:18:08,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:18:08,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:18:08,825 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:18:08,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:18:08,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:18:08,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:18:08,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:18:08,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:18:08,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:18:08,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:18:08,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:18:08,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:18:08,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:18:08,836 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:18:08,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:18:08,838 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:18:08,839 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:18:08,839 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:18:08,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:18:08,840 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:18:08,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:18:08,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:18:08,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:18:08,842 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:18:08,863 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:18:08,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:18:08,863 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:18:08,864 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:18:08,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:18:08,865 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:18:08,865 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:18:08,865 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:18:08,865 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:18:08,865 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:18:08,866 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:18:08,866 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:18:08,866 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:18:08,866 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:18:08,866 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:18:08,867 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:18:08,867 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:18:08,867 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:18:08,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:18:08,868 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:18:08,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:18:08,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:18:08,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:18:08,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:18:08,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:18:08,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:18:08,869 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:18:08,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:18:08,869 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:18:08,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:18:08,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:18:08,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:18:08,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:18:08,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:18:08,869 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:18:08,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:18:08,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:18:08,870 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:18:08,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:18:08,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:18:08,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:18:08,870 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_8868f9ba-3831-4907-b12d-c719c1409cca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 217f19c8e5e57d916627a12a8c23c5343b3d451054ddc6d3d6dc70e40dff121a [2022-12-14 06:18:09,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:18:09,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:18:09,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:18:09,055 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:18:09,055 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:18:09,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-examples/standard_copy3_ground-2.i [2022-12-14 06:18:11,571 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:18:11,731 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:18:11,731 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/sv-benchmarks/c/array-examples/standard_copy3_ground-2.i [2022-12-14 06:18:11,735 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/data/d6d26fdd5/855faf9097b049f8aad3ca9b539b8029/FLAG3713adfff [2022-12-14 06:18:12,156 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/data/d6d26fdd5/855faf9097b049f8aad3ca9b539b8029 [2022-12-14 06:18:12,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:18:12,159 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:18:12,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:18:12,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:18:12,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:18:12,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:18:12" (1/1) ... [2022-12-14 06:18:12,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5426c893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:12, skipping insertion in model container [2022-12-14 06:18:12,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:18:12" (1/1) ... [2022-12-14 06:18:12,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:18:12,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:18:12,278 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_8868f9ba-3831-4907-b12d-c719c1409cca/sv-benchmarks/c/array-examples/standard_copy3_ground-2.i[816,829] [2022-12-14 06:18:12,289 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:18:12,296 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:18:12,304 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_8868f9ba-3831-4907-b12d-c719c1409cca/sv-benchmarks/c/array-examples/standard_copy3_ground-2.i[816,829] [2022-12-14 06:18:12,310 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:18:12,320 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:18:12,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:12 WrapperNode [2022-12-14 06:18:12,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:18:12,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:18:12,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:18:12,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:18:12,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:12" (1/1) ... [2022-12-14 06:18:12,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:12" (1/1) ... [2022-12-14 06:18:12,345 INFO L138 Inliner]: procedures = 16, calls = 29, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 99 [2022-12-14 06:18:12,345 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:18:12,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:18:12,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:18:12,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:18:12,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:12" (1/1) ... [2022-12-14 06:18:12,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:12" (1/1) ... [2022-12-14 06:18:12,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:12" (1/1) ... [2022-12-14 06:18:12,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:12" (1/1) ... [2022-12-14 06:18:12,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:12" (1/1) ... [2022-12-14 06:18:12,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:12" (1/1) ... [2022-12-14 06:18:12,369 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:12" (1/1) ... [2022-12-14 06:18:12,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:12" (1/1) ... [2022-12-14 06:18:12,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:18:12,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:18:12,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:18:12,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:18:12,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:12" (1/1) ... [2022-12-14 06:18:12,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:18:12,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:12,398 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:18:12,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:18:12,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:18:12,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:18:12,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 06:18:12,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 06:18:12,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:18:12,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:18:12,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 06:18:12,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 06:18:12,491 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:18:12,493 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:18:12,615 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:18:12,645 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:18:12,645 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-14 06:18:12,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:18:12 BoogieIcfgContainer [2022-12-14 06:18:12,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:18:12,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:18:12,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:18:12,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:18:12,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:18:12" (1/3) ... [2022-12-14 06:18:12,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2496c49c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:18:12, skipping insertion in model container [2022-12-14 06:18:12,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:12" (2/3) ... [2022-12-14 06:18:12,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2496c49c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:18:12, skipping insertion in model container [2022-12-14 06:18:12,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:18:12" (3/3) ... [2022-12-14 06:18:12,655 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-2.i [2022-12-14 06:18:12,670 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:18:12,670 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:18:12,705 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:18:12,710 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;@325b36a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:18:12,710 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:18:12,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 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 06:18:12,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 06:18:12,718 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:12,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:12,718 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:12,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:12,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1881555841, now seen corresponding path program 1 times [2022-12-14 06:18:12,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:12,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810213775] [2022-12-14 06:18:12,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:12,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:12,931 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 06:18:12,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:12,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810213775] [2022-12-14 06:18:12,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810213775] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:12,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:18:12,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:18:12,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050281991] [2022-12-14 06:18:12,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:12,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:18:12,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:12,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:18:12,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:18:12,967 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 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) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 06:18:13,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:13,009 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2022-12-14 06:18:13,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:18:13,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2022-12-14 06:18:13,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:13,018 INFO L225 Difference]: With dead ends: 21 [2022-12-14 06:18:13,018 INFO L226 Difference]: Without dead ends: 11 [2022-12-14 06:18:13,020 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 06:18:13,023 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 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 06:18:13,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:18:13,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-12-14 06:18:13,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-12-14 06:18:13,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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 06:18:13,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2022-12-14 06:18:13,045 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 8 [2022-12-14 06:18:13,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:13,045 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2022-12-14 06:18:13,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 06:18:13,046 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2022-12-14 06:18:13,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 06:18:13,046 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:13,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:13,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:18:13,047 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:13,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:13,047 INFO L85 PathProgramCache]: Analyzing trace with hash -2007425254, now seen corresponding path program 1 times [2022-12-14 06:18:13,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:13,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654798706] [2022-12-14 06:18:13,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:13,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:18:13,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:13,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654798706] [2022-12-14 06:18:13,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654798706] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:18:13,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044444805] [2022-12-14 06:18:13,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:13,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:13,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:13,155 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:13,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:18:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:13,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:18:13,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:18:13,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:18:13,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044444805] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:13,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:18:13,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 06:18:13,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553646585] [2022-12-14 06:18:13,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:13,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:18:13,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:13,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:18:13,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:18:13,244 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 06:18:13,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:13,270 INFO L93 Difference]: Finished difference Result 21 states and 30 transitions. [2022-12-14 06:18:13,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:18:13,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2022-12-14 06:18:13,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:13,271 INFO L225 Difference]: With dead ends: 21 [2022-12-14 06:18:13,271 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 06:18:13,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:18:13,272 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:13,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:18:13,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 06:18:13,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-12-14 06:18:13,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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 06:18:13,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2022-12-14 06:18:13,275 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 9 [2022-12-14 06:18:13,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:13,276 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2022-12-14 06:18:13,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 06:18:13,276 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2022-12-14 06:18:13,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 06:18:13,276 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:13,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:13,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:18:13,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:13,479 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:13,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:13,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1293090587, now seen corresponding path program 1 times [2022-12-14 06:18:13,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:13,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483057872] [2022-12-14 06:18:13,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:13,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 06:18:13,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:13,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483057872] [2022-12-14 06:18:13,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483057872] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:18:13,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643050250] [2022-12-14 06:18:13,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:13,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:13,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:13,651 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:13,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:18:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:13,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:18:13,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 06:18:13,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:18:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 06:18:13,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643050250] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:18:13,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [143152222] [2022-12-14 06:18:13,765 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:18:13,766 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:18:13,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:18:13,772 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:18:13,772 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:18:13,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:13,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:13,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:13,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:13,944 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-12-14 06:18:13,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-12-14 06:18:13,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:13,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:13,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:13,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:14,086 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 06:18:14,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 06:18:14,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:14,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:14,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 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 06:18:14,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:14,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:14,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:14,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:14,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:14,399 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 06:18:14,400 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 420 treesize of output 410 [2022-12-14 06:18:14,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:14,915 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:18:14,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 06:18:14,947 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:18:14,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:18:14,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:14,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:15,025 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 06:18:15,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 06:18:15,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:15,107 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:15,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:15,130 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:18:15,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:18:15,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:15,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:15,189 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 06:18:15,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 06:18:15,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:15,253 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:15,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:15,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:15,277 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:15,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:15,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:15,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:15,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:15,321 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 06:18:15,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-12-14 06:18:15,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:15,359 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:15,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:15,374 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:18:15,510 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '223#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 06:18:15,511 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:18:15,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:18:15,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 06:18:15,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765901648] [2022-12-14 06:18:15,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:18:15,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:18:15,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:15,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:18:15,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:18:15,513 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 06:18:15,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:15,544 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2022-12-14 06:18:15,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:18:15,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 12 [2022-12-14 06:18:15,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:15,545 INFO L225 Difference]: With dead ends: 28 [2022-12-14 06:18:15,545 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 06:18:15,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:18:15,546 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:15,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:18:15,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 06:18:15,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-14 06:18:15,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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 06:18:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-12-14 06:18:15,550 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2022-12-14 06:18:15,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:15,550 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-12-14 06:18:15,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 06:18:15,551 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-12-14 06:18:15,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 06:18:15,551 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:15,551 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:15,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 06:18:15,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:15,753 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:15,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:15,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1491736354, now seen corresponding path program 2 times [2022-12-14 06:18:15,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:15,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310230381] [2022-12-14 06:18:15,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:15,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:18:15,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:15,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310230381] [2022-12-14 06:18:15,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310230381] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:18:15,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241826693] [2022-12-14 06:18:15,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:18:15,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:15,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:15,890 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:15,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:18:15,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 06:18:15,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:18:15,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:18:15,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:18:15,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:18:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:18:15,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241826693] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:18:15,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [490568913] [2022-12-14 06:18:15,985 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:18:15,985 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:18:15,985 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:18:15,985 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:18:15,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:18:16,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:16,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:16,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:16,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:16,093 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 06:18:16,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 06:18:16,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:16,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:16,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:16,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:16,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-12-14 06:18:16,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:16,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:16,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 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 06:18:16,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:16,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:16,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:16,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:16,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:16,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:16,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:16,323 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 06:18:16,324 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 440 treesize of output 408 [2022-12-14 06:18:16,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:16,440 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:18:16,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 06:18:16,464 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:18:16,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:18:16,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:16,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:16,517 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 06:18:16,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 06:18:16,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:16,572 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:16,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:16,591 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:18:16,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:18:16,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:16,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:16,643 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 06:18:16,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 06:18:16,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:16,689 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:16,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:16,706 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:18:16,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:18:16,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:16,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:16,761 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 06:18:16,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 06:18:16,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:16,809 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:16,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:16,822 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:18:16,948 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '395#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 06:18:16,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:18:16,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:18:16,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 06:18:16,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810144150] [2022-12-14 06:18:16,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:18:16,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:18:16,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:16,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:18:16,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:18:16,951 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 06:18:16,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:16,994 INFO L93 Difference]: Finished difference Result 35 states and 50 transitions. [2022-12-14 06:18:16,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:18:16,994 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 15 [2022-12-14 06:18:16,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:16,995 INFO L225 Difference]: With dead ends: 35 [2022-12-14 06:18:16,995 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 06:18:16,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:18:16,996 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:16,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:18:16,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 06:18:16,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-12-14 06:18:16,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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 06:18:16,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-12-14 06:18:16,999 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2022-12-14 06:18:17,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:17,000 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-12-14 06:18:17,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 06:18:17,000 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-12-14 06:18:17,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 06:18:17,000 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:17,000 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:17,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:18:17,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:17,202 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:17,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:17,204 INFO L85 PathProgramCache]: Analyzing trace with hash 955644801, now seen corresponding path program 3 times [2022-12-14 06:18:17,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:17,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090160776] [2022-12-14 06:18:17,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:17,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 06:18:17,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:17,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090160776] [2022-12-14 06:18:17,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090160776] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:18:17,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547981262] [2022-12-14 06:18:17,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:18:17,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:17,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:17,380 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:17,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:18:17,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:18:17,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:18:17,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 06:18:17,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 06:18:17,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:18:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 06:18:17,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547981262] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:18:17,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2041807449] [2022-12-14 06:18:17,506 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:18:17,506 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:18:17,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:18:17,506 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:18:17,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:18:17,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:17,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:17,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:17,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:17,591 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-12-14 06:18:17,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-12-14 06:18:17,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:17,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:17,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:17,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:17,683 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 06:18:17,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 06:18:17,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:17,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:17,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 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 06:18:17,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:17,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:17,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:17,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:17,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:17,874 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 06:18:17,875 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 420 treesize of output 410 [2022-12-14 06:18:18,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:18,233 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:18:18,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 06:18:18,257 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:18:18,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:18:18,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:18,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:18,335 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 06:18:18,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 06:18:18,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:18,406 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:18,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:18,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:18,428 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:18,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:18,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:18,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:18,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:18,461 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 06:18:18,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-12-14 06:18:18,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:18,505 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:18,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:18,532 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:18:18,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:18:18,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:18,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:18,587 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 06:18:18,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 06:18:18,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:18,645 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:18,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:18,654 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:18:18,875 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '659#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 06:18:18,875 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:18:18,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:18:18,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 06:18:18,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919175594] [2022-12-14 06:18:18,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:18:18,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 06:18:18,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:18,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 06:18:18,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-12-14 06:18:18,877 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 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 06:18:18,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:18,906 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2022-12-14 06:18:18,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 06:18:18,906 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 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 24 [2022-12-14 06:18:18,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:18,907 INFO L225 Difference]: With dead ends: 52 [2022-12-14 06:18:18,907 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 06:18:18,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-12-14 06:18:18,907 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:18,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:18:18,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 06:18:18,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-12-14 06:18:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 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 06:18:18,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-12-14 06:18:18,910 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 24 [2022-12-14 06:18:18,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:18,910 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-12-14 06:18:18,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 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 06:18:18,910 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-12-14 06:18:18,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 06:18:18,911 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:18,911 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:18,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 06:18:19,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:19,112 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:19,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:19,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1504002847, now seen corresponding path program 4 times [2022-12-14 06:18:19,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:19,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468161371] [2022-12-14 06:18:19,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:19,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 06:18:19,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:19,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468161371] [2022-12-14 06:18:19,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468161371] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:18:19,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530760903] [2022-12-14 06:18:19,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:18:19,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:19,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:19,388 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:19,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:18:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:19,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 06:18:19,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 06:18:19,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:18:19,644 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 06:18:19,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530760903] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:18:19,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [272483421] [2022-12-14 06:18:19,645 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:18:19,646 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:18:19,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:18:19,646 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:18:19,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:18:19,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:19,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:19,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:19,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:19,741 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 06:18:19,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 06:18:19,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:19,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:19,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:19,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:19,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-12-14 06:18:19,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:19,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:19,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 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 06:18:19,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:19,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:19,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:19,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:19,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:19,921 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 06:18:19,922 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 420 treesize of output 410 [2022-12-14 06:18:20,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:20,242 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:18:20,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 06:18:20,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:20,265 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:20,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:20,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:20,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:20,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:20,295 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 06:18:20,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-12-14 06:18:20,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:20,325 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:20,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:20,342 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:18:20,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:18:20,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:20,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:20,399 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 06:18:20,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 06:18:20,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:20,448 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:20,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:20,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:20,468 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:20,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:20,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:20,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:20,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:20,496 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 06:18:20,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-12-14 06:18:20,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:20,526 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:20,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:20,536 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:18:20,688 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1017#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 06:18:20,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:18:20,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:18:20,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-14 06:18:20,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985456172] [2022-12-14 06:18:20,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:18:20,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 06:18:20,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:20,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 06:18:20,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-12-14 06:18:20,691 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 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 06:18:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:20,730 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2022-12-14 06:18:20,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 06:18:20,731 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 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 30 [2022-12-14 06:18:20,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:20,731 INFO L225 Difference]: With dead ends: 64 [2022-12-14 06:18:20,731 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 06:18:20,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-12-14 06:18:20,732 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:20,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:18:20,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 06:18:20,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-12-14 06:18:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 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 06:18:20,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-12-14 06:18:20,738 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 30 [2022-12-14 06:18:20,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:20,738 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-12-14 06:18:20,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 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 06:18:20,738 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-12-14 06:18:20,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 06:18:20,739 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:20,739 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:20,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:18:20,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 06:18:20,941 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:20,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:20,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1842436191, now seen corresponding path program 5 times [2022-12-14 06:18:20,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:20,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752383221] [2022-12-14 06:18:20,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:20,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 06:18:21,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:21,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752383221] [2022-12-14 06:18:21,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752383221] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:18:21,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455620504] [2022-12-14 06:18:21,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:18:21,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:21,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:21,519 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:21,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:18:21,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:18:21,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:18:21,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 06:18:21,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-12-14 06:18:21,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:18:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-12-14 06:18:21,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455620504] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:18:21,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1541191545] [2022-12-14 06:18:21,781 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:18:21,781 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:18:21,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:18:21,782 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:18:21,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:18:21,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:21,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:21,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:21,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:21,861 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-12-14 06:18:21,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-12-14 06:18:21,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:21,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:21,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:21,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:21,960 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 06:18:21,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 06:18:21,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:21,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:21,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 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 06:18:22,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:22,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:22,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:22,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:22,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:22,139 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 06:18:22,139 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 420 treesize of output 410 [2022-12-14 06:18:22,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:22,457 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:18:22,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 06:18:22,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:22,476 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:22,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:22,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:22,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:22,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:22,503 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 06:18:22,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-12-14 06:18:22,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:22,530 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:22,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:22,545 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:18:22,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:18:22,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:22,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:22,601 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 06:18:22,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 06:18:22,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:22,650 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:22,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:22,664 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:18:22,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:18:22,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:22,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:22,704 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 06:18:22,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 06:18:22,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:22,751 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:22,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:22,761 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:18:22,929 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1505#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 06:18:22,930 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:18:22,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:18:22,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-12-14 06:18:22,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309495416] [2022-12-14 06:18:22,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:18:22,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 06:18:22,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:22,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 06:18:22,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 06:18:22,933 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 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 06:18:23,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:23,014 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2022-12-14 06:18:23,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 06:18:23,015 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 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 42 [2022-12-14 06:18:23,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:23,016 INFO L225 Difference]: With dead ends: 83 [2022-12-14 06:18:23,016 INFO L226 Difference]: Without dead ends: 63 [2022-12-14 06:18:23,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 06:18:23,017 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:23,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:18:23,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-14 06:18:23,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-12-14 06:18:23,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 states have internal predecessors, (67), 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 06:18:23,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-12-14 06:18:23,023 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 42 [2022-12-14 06:18:23,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:23,024 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-12-14 06:18:23,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 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 06:18:23,024 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-12-14 06:18:23,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 06:18:23,025 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:23,025 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:23,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:18:23,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:23,226 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:23,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:23,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1067547482, now seen corresponding path program 6 times [2022-12-14 06:18:23,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:23,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653825382] [2022-12-14 06:18:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:23,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-12-14 06:18:23,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:23,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653825382] [2022-12-14 06:18:23,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653825382] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:18:23,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52596801] [2022-12-14 06:18:23,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:18:23,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:23,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:23,845 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:23,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:18:23,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:18:23,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:18:23,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 06:18:23,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-12-14 06:18:24,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:18:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-12-14 06:18:24,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52596801] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:18:24,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [221378185] [2022-12-14 06:18:24,447 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:18:24,448 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:18:24,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:18:24,448 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:18:24,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:18:24,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:24,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:24,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:24,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:24,542 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 06:18:24,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 06:18:24,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:24,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:24,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:24,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:24,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-12-14 06:18:24,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:24,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:24,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 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 06:18:24,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:24,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:24,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:24,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:24,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:24,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:24,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:24,702 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 06:18:24,702 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 440 treesize of output 408 [2022-12-14 06:18:24,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:24,772 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:18:24,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 06:18:24,793 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:18:24,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:18:24,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:24,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:24,856 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 06:18:24,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 06:18:24,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:24,895 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:24,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:24,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:24,913 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:24,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:24,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:24,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:24,940 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 06:18:24,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-12-14 06:18:24,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:24,974 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:24,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:25,008 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:18:25,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:18:25,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:25,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:25,061 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 06:18:25,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 06:18:25,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:25,104 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:25,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:25,120 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:18:25,580 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2199#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 06:18:25,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:18:25,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:18:25,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-12-14 06:18:25,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420653962] [2022-12-14 06:18:25,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:18:25,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 06:18:25,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:25,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 06:18:25,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 06:18:25,585 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 states have internal predecessors, (61), 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 06:18:25,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:25,654 INFO L93 Difference]: Finished difference Result 126 states and 158 transitions. [2022-12-14 06:18:25,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 06:18:25,654 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 states have internal predecessors, (61), 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 61 [2022-12-14 06:18:25,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:25,655 INFO L225 Difference]: With dead ends: 126 [2022-12-14 06:18:25,655 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 06:18:25,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 141 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 06:18:25,656 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:25,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:18:25,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 06:18:25,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-12-14 06:18:25,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 87 states have internal predecessors, (92), 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 06:18:25,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-12-14 06:18:25,661 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 61 [2022-12-14 06:18:25,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:25,661 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-12-14 06:18:25,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 states have internal predecessors, (61), 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 06:18:25,661 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-12-14 06:18:25,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 06:18:25,663 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:25,663 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:25,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 06:18:25,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:25,865 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:25,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:25,866 INFO L85 PathProgramCache]: Analyzing trace with hash 462938849, now seen corresponding path program 7 times [2022-12-14 06:18:25,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:25,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862378421] [2022-12-14 06:18:25,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:25,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-12-14 06:18:27,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:27,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862378421] [2022-12-14 06:18:27,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862378421] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:18:27,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772716340] [2022-12-14 06:18:27,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:18:27,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:27,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:27,621 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:27,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 06:18:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:27,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 06:18:27,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-12-14 06:18:27,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:18:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-12-14 06:18:29,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772716340] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:18:29,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [965666541] [2022-12-14 06:18:29,922 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:18:29,922 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:18:29,922 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:18:29,922 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:18:29,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:18:29,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:29,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:29,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:29,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:30,012 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 06:18:30,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 06:18:30,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:30,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:30,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:30,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:30,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-12-14 06:18:30,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:30,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:30,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 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 06:18:30,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:30,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:30,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:30,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:30,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:30,189 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 06:18:30,190 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 420 treesize of output 410 [2022-12-14 06:18:30,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:30,558 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:18:30,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 06:18:30,574 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:18:30,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:18:30,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:30,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:30,621 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 06:18:30,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 06:18:30,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:30,664 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:30,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:30,680 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:18:30,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:18:30,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:30,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:30,728 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 06:18:30,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 06:18:30,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:30,760 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:30,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:30,775 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:18:30,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:18:30,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:30,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:30,825 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 06:18:30,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 06:18:30,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:30,874 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:30,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:30,883 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:18:31,118 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3229#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 06:18:31,118 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:18:31,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:18:31,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-12-14 06:18:31,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450588073] [2022-12-14 06:18:31,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:18:31,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-12-14 06:18:31,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:31,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-12-14 06:18:31,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 06:18:31,124 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 100 states have internal predecessors, (111), 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 06:18:31,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:31,247 INFO L93 Difference]: Finished difference Result 176 states and 233 transitions. [2022-12-14 06:18:31,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-12-14 06:18:31,248 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 100 states have internal predecessors, (111), 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 86 [2022-12-14 06:18:31,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:31,249 INFO L225 Difference]: With dead ends: 176 [2022-12-14 06:18:31,249 INFO L226 Difference]: Without dead ends: 138 [2022-12-14 06:18:31,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 06:18:31,251 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:31,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:18:31,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-12-14 06:18:31,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-12-14 06:18:31,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 137 states have internal predecessors, (142), 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 06:18:31,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2022-12-14 06:18:31,262 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 86 [2022-12-14 06:18:31,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:31,262 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2022-12-14 06:18:31,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 100 states have internal predecessors, (111), 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 06:18:31,263 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2022-12-14 06:18:31,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 06:18:31,264 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:31,265 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:31,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 06:18:31,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:31,466 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:31,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:31,467 INFO L85 PathProgramCache]: Analyzing trace with hash 876185857, now seen corresponding path program 8 times [2022-12-14 06:18:31,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:31,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327453521] [2022-12-14 06:18:31,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:31,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-12-14 06:18:36,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:36,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327453521] [2022-12-14 06:18:36,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327453521] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:18:36,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475722907] [2022-12-14 06:18:36,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:18:36,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:36,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:36,676 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:36,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 06:18:40,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 06:18:40,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:18:40,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 06:18:40,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4961 trivial. 0 not checked. [2022-12-14 06:18:41,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:18:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4961 trivial. 0 not checked. [2022-12-14 06:18:41,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475722907] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:18:41,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1016912099] [2022-12-14 06:18:41,605 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:18:41,605 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:18:41,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:18:41,606 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:18:41,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:18:41,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:41,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:41,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:41,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:41,665 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-12-14 06:18:41,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-12-14 06:18:41,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:41,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:41,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:41,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:41,754 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 06:18:41,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 06:18:41,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:41,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:41,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 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 06:18:41,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:41,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:41,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:41,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:41,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:41,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:41,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:41,887 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 06:18:41,888 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 440 treesize of output 408 [2022-12-14 06:18:41,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:41,968 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:18:41,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 06:18:41,988 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:18:41,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:18:42,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:42,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:42,036 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 06:18:42,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 06:18:42,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:42,075 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:42,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:42,090 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:18:42,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:18:42,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:42,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:42,141 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 06:18:42,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 06:18:42,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:42,197 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:42,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:42,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:42,212 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:42,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:42,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:42,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:42,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:42,242 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 06:18:42,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-12-14 06:18:42,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:42,271 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:42,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:42,283 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:18:42,753 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4781#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 06:18:42,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:18:42,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:18:42,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-12-14 06:18:42,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990682967] [2022-12-14 06:18:42,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:18:42,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-12-14 06:18:42,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:42,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-12-14 06:18:42,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 06:18:42,759 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 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 06:18:43,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:43,018 INFO L93 Difference]: Finished difference Result 213 states and 257 transitions. [2022-12-14 06:18:43,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-12-14 06:18:43,019 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 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 136 [2022-12-14 06:18:43,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:43,019 INFO L225 Difference]: With dead ends: 213 [2022-12-14 06:18:43,020 INFO L226 Difference]: Without dead ends: 175 [2022-12-14 06:18:43,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 06:18:43,022 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:43,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:18:43,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-12-14 06:18:43,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-12-14 06:18:43,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.028735632183908) internal successors, (179), 174 states have internal predecessors, (179), 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 06:18:43,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 179 transitions. [2022-12-14 06:18:43,030 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 179 transitions. Word has length 136 [2022-12-14 06:18:43,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:43,030 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 179 transitions. [2022-12-14 06:18:43,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 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 06:18:43,030 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 179 transitions. [2022-12-14 06:18:43,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-14 06:18:43,031 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:43,032 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:43,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 06:18:43,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 06:18:43,233 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:43,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:43,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1527330470, now seen corresponding path program 9 times [2022-12-14 06:18:43,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:43,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665209599] [2022-12-14 06:18:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:43,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5709 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-12-14 06:18:48,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:48,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665209599] [2022-12-14 06:18:48,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665209599] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:18:48,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88256989] [2022-12-14 06:18:48,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:18:48,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:48,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:48,694 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:48,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 06:18:49,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:18:49,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:18:49,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 2246 conjuncts, 101 conjunts are in the unsatisfiable core [2022-12-14 06:18:49,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5709 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-12-14 06:18:49,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:18:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5709 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-12-14 06:18:56,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88256989] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:18:56,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [131255417] [2022-12-14 06:18:56,311 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:18:56,311 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:18:56,312 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:18:56,312 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:18:56,312 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:18:56,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:56,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:56,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:56,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:56,390 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-12-14 06:18:56,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-12-14 06:18:56,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:56,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:56,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:56,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:56,487 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 06:18:56,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 06:18:56,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:56,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:56,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 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 06:18:56,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:56,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:56,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:56,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:56,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:56,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:18:56,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:56,631 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 06:18:56,631 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 440 treesize of output 408 [2022-12-14 06:18:56,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:56,711 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:18:56,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 06:18:56,733 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:18:56,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:18:56,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:56,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:56,784 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 06:18:56,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 06:18:56,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:56,827 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:56,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:56,845 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:18:56,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:18:56,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:56,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:56,931 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 06:18:56,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 06:18:56,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:57,001 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:57,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:57,021 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:18:57,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:18:57,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:57,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:57,083 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 06:18:57,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 06:18:57,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:18:57,148 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:18:57,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:18:57,160 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:18:57,599 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6783#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 06:18:57,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:18:57,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:18:57,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-12-14 06:18:57,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910758685] [2022-12-14 06:18:57,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:18:57,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-12-14 06:18:57,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:57,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-12-14 06:18:57,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-12-14 06:18:57,608 INFO L87 Difference]: Start difference. First operand 175 states and 179 transitions. Second operand has 203 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 202 states have internal predecessors, (213), 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 06:18:57,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:57,973 INFO L93 Difference]: Finished difference Result 350 states and 458 transitions. [2022-12-14 06:18:57,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-12-14 06:18:57,973 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 202 states have internal predecessors, (213), 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 173 [2022-12-14 06:18:57,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:57,974 INFO L225 Difference]: With dead ends: 350 [2022-12-14 06:18:57,974 INFO L226 Difference]: Without dead ends: 276 [2022-12-14 06:18:57,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-12-14 06:18:57,977 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:57,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:18:57,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-12-14 06:18:57,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2022-12-14 06:18:57,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.018181818181818) internal successors, (280), 275 states have internal predecessors, (280), 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 06:18:57,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 280 transitions. [2022-12-14 06:18:57,994 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 280 transitions. Word has length 173 [2022-12-14 06:18:57,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:57,994 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 280 transitions. [2022-12-14 06:18:57,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 202 states have internal predecessors, (213), 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 06:18:57,995 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 280 transitions. [2022-12-14 06:18:57,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-12-14 06:18:57,997 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:57,997 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:58,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 06:18:58,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:58,199 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:58,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:58,201 INFO L85 PathProgramCache]: Analyzing trace with hash 13614497, now seen corresponding path program 10 times [2022-12-14 06:18:58,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:58,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044054916] [2022-12-14 06:18:58,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:58,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:19:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 20859 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-12-14 06:19:19,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:19:19,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044054916] [2022-12-14 06:19:19,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044054916] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:19:19,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795762101] [2022-12-14 06:19:19,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:19:19,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:19:19,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:19:19,069 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:19:19,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 06:19:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:19:19,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 3963 conjuncts, 202 conjunts are in the unsatisfiable core [2022-12-14 06:19:19,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:19:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20859 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-12-14 06:19:19,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:19:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20859 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-12-14 06:19:49,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795762101] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:19:49,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [92388105] [2022-12-14 06:19:49,119 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:19:49,119 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:19:49,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:19:49,119 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:19:49,119 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:19:49,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:49,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:49,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:49,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:49,171 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-12-14 06:19:49,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-12-14 06:19:49,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:49,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:49,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:49,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:49,239 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 06:19:49,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 06:19:49,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:49,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:49,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 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 06:19:49,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:49,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:49,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:19:49,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:19:49,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:19:49,383 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 06:19:49,383 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 420 treesize of output 410 [2022-12-14 06:19:49,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:19:49,673 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:19:49,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 06:19:49,689 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:19:49,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:19:49,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:19:49,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:19:49,745 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 06:19:49,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 06:19:49,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:19:49,793 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:19:49,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:19:49,807 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:19:49,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:19:49,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:19:49,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:19:49,855 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 06:19:49,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 06:19:49,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:19:49,899 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:19:49,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:19:49,915 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:19:49,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:19:49,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:19:49,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:19:49,964 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 06:19:49,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 06:19:49,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:19:49,999 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:19:50,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:19:50,008 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:19:50,797 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10069#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 06:19:50,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:19:50,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:19:50,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-12-14 06:19:50,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548166863] [2022-12-14 06:19:50,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:19:50,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-12-14 06:19:50,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:19:50,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-12-14 06:19:50,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-12-14 06:19:50,823 INFO L87 Difference]: Start difference. First operand 276 states and 280 transitions. Second operand has 405 states, 405 states have (on average 1.0246913580246915) internal successors, (415), 404 states have internal predecessors, (415), 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 06:19:52,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:19:52,942 INFO L93 Difference]: Finished difference Result 552 states and 761 transitions. [2022-12-14 06:19:52,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-12-14 06:19:52,943 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0246913580246915) internal successors, (415), 404 states have internal predecessors, (415), 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 274 [2022-12-14 06:19:52,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:19:52,944 INFO L225 Difference]: With dead ends: 552 [2022-12-14 06:19:52,944 INFO L226 Difference]: Without dead ends: 478 [2022-12-14 06:19:52,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1022 GetRequests, 614 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-12-14 06:19:52,951 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:19:52,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:19:52,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-12-14 06:19:52,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 478. [2022-12-14 06:19:52,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 1.0104821802935011) internal successors, (482), 477 states have internal predecessors, (482), 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 06:19:52,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 482 transitions. [2022-12-14 06:19:52,963 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 482 transitions. Word has length 274 [2022-12-14 06:19:52,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:19:52,964 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 482 transitions. [2022-12-14 06:19:52,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0246913580246915) internal successors, (415), 404 states have internal predecessors, (415), 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 06:19:52,964 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 482 transitions. [2022-12-14 06:19:52,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2022-12-14 06:19:52,969 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:19:52,969 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:19:52,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 06:19:53,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:19:53,171 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:19:53,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:19:53,172 INFO L85 PathProgramCache]: Analyzing trace with hash -358493887, now seen corresponding path program 11 times [2022-12-14 06:19:53,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:19:53,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433697585] [2022-12-14 06:19:53,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:19:53,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:19:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:21:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 81762 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-12-14 06:21:18,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:21:18,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433697585] [2022-12-14 06:21:18,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433697585] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:21:18,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037605783] [2022-12-14 06:21:18,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:21:18,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:21:18,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:21:18,171 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:21:18,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 06:24:09,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-14 06:24:09,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:24:09,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 06:24:09,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:24:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 81762 backedges. 421 proven. 1456 refuted. 0 times theorem prover too weak. 79885 trivial. 0 not checked. [2022-12-14 06:24:12,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:24:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 81762 backedges. 0 proven. 401 refuted. 0 times theorem prover too weak. 81361 trivial. 0 not checked. [2022-12-14 06:24:15,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037605783] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:24:15,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1714968077] [2022-12-14 06:24:15,377 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:24:15,377 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:24:15,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:24:15,377 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:24:15,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:24:15,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:24:15,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:24:15,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:24:15,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:24:15,456 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 06:24:15,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 06:24:15,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:24:15,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:24:15,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:24:15,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:24:15,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-12-14 06:24:15,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:24:15,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:24:15,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 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 06:24:15,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:24:15,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:24:15,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:24:15,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:24:15,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:24:15,611 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 06:24:15,611 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 420 treesize of output 410 [2022-12-14 06:24:15,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:24:15,928 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:24:15,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 06:24:15,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:24:15,947 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:24:15,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:24:15,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:24:15,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:24:15,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:24:15,990 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 06:24:15,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-12-14 06:24:16,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:24:16,013 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:24:16,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:24:16,029 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:24:16,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:24:16,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:24:16,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:24:16,078 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 06:24:16,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 06:24:16,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:24:16,104 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:24:16,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:24:16,118 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:24:16,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:24:16,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:24:16,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:24:16,160 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 06:24:16,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 06:24:16,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:24:16,205 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:24:16,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:24:16,215 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:24:17,348 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15425#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 06:24:17,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:24:17,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:24:17,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 30, 25] total 455 [2022-12-14 06:24:17,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504231980] [2022-12-14 06:24:17,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:24:17,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 455 states [2022-12-14 06:24:17,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:17,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 455 interpolants. [2022-12-14 06:24:17,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84205, Invalid=126935, Unknown=0, NotChecked=0, Total=211140 [2022-12-14 06:24:17,367 INFO L87 Difference]: Start difference. First operand 478 states and 482 transitions. Second operand has 455 states, 455 states have (on average 1.054945054945055) internal successors, (480), 455 states have internal predecessors, (480), 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 06:24:26,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:26,781 INFO L93 Difference]: Finished difference Result 625 states and 705 transitions. [2022-12-14 06:24:26,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 454 states. [2022-12-14 06:24:26,782 INFO L78 Accepts]: Start accepts. Automaton has has 455 states, 455 states have (on average 1.054945054945055) internal successors, (480), 455 states have internal predecessors, (480), 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 476 [2022-12-14 06:24:26,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:26,783 INFO L225 Difference]: With dead ends: 625 [2022-12-14 06:24:26,783 INFO L226 Difference]: Without dead ends: 551 [2022-12-14 06:24:26,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1925 GetRequests, 1419 SyntacticMatches, 0 SemanticMatches, 506 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24875 ImplicationChecksByTransitivity, 51.1s TimeCoverageRelationStatistics Valid=86606, Invalid=170950, Unknown=0, NotChecked=0, Total=257556 [2022-12-14 06:24:26,793 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 191 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:26,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 40 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:24:26,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-12-14 06:24:26,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 551. [2022-12-14 06:24:26,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 1.009090909090909) internal successors, (555), 550 states have internal predecessors, (555), 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 06:24:26,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 555 transitions. [2022-12-14 06:24:26,809 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 555 transitions. Word has length 476 [2022-12-14 06:24:26,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:26,809 INFO L495 AbstractCegarLoop]: Abstraction has 551 states and 555 transitions. [2022-12-14 06:24:26,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 455 states, 455 states have (on average 1.054945054945055) internal successors, (480), 455 states have internal predecessors, (480), 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 06:24:26,810 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 555 transitions. [2022-12-14 06:24:26,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2022-12-14 06:24:26,817 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:26,817 INFO L195 NwaCegarLoop]: trace histogram [403, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:24:26,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 06:24:27,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 06:24:27,019 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:27,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:27,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1213544410, now seen corresponding path program 12 times [2022-12-14 06:24:27,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:27,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760578460] [2022-12-14 06:24:27,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:27,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:25:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 84649 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2022-12-14 06:25:56,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:25:56,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760578460] [2022-12-14 06:25:56,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760578460] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:25:56,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618910890] [2022-12-14 06:25:56,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:25:56,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:25:56,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:25:56,007 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:25:56,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 06:25:57,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:25:57,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:25:57,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 7918 conjuncts, 405 conjunts are in the unsatisfiable core [2022-12-14 06:25:57,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:25:57,843 INFO L134 CoverageAnalysis]: Checked inductivity of 84649 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2022-12-14 06:25:57,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:28:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 84649 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2022-12-14 06:28:01,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618910890] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:28:01,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [857203457] [2022-12-14 06:28:01,616 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:28:01,617 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:28:01,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:28:01,617 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:28:01,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:28:01,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:28:01,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:28:01,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:28:01,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:28:01,698 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 06:28:01,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 06:28:01,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:28:01,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:28:01,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:28:01,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:28:01,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-12-14 06:28:01,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:28:01,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:28:01,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 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 06:28:01,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:28:01,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:28:01,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:28:01,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:28:01,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:28:01,936 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 06:28:01,937 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 420 treesize of output 410 [2022-12-14 06:28:02,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:28:02,286 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:28:02,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 06:28:02,303 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:28:02,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:28:02,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:28:02,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:28:02,345 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 06:28:02,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 06:28:02,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:28:02,386 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:28:02,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:28:02,401 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:28:02,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:28:02,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:28:02,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:28:02,441 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 06:28:02,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 06:28:02,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:28:02,486 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:28:02,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:28:02,500 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:28:02,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:28:02,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:28:02,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:28:02,558 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 06:28:02,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 06:28:02,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:28:02,618 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:28:02,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:28:02,629 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:28:03,713 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22010#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 06:28:03,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:28:03,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:28:03,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 405, 405] total 810 [2022-12-14 06:28:03,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682076978] [2022-12-14 06:28:03,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:28:03,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2022-12-14 06:28:03,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:28:03,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2022-12-14 06:28:03,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328475, Invalid=336565, Unknown=0, NotChecked=0, Total=665040 [2022-12-14 06:28:03,793 INFO L87 Difference]: Start difference. First operand 551 states and 555 transitions. Second operand has 811 states, 811 states have (on average 1.0123304562268804) internal successors, (821), 810 states have internal predecessors, (821), 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 06:28:16,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:28:16,820 INFO L93 Difference]: Finished difference Result 1102 states and 1514 transitions. [2022-12-14 06:28:16,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2022-12-14 06:28:16,821 INFO L78 Accepts]: Start accepts. Automaton has has 811 states, 811 states have (on average 1.0123304562268804) internal successors, (821), 810 states have internal predecessors, (821), 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 549 [2022-12-14 06:28:16,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:28:16,823 INFO L225 Difference]: With dead ends: 1102 [2022-12-14 06:28:16,823 INFO L226 Difference]: Without dead ends: 956 [2022-12-14 06:28:16,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2050 GetRequests, 1236 SyntacticMatches, 0 SemanticMatches, 814 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7672 ImplicationChecksByTransitivity, 161.9s TimeCoverageRelationStatistics Valid=328475, Invalid=336565, Unknown=0, NotChecked=0, Total=665040 [2022-12-14 06:28:16,851 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:28:16,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 06:28:16,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-12-14 06:28:16,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 956. [2022-12-14 06:28:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 1.0052356020942408) internal successors, (960), 955 states have internal predecessors, (960), 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 06:28:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 960 transitions. [2022-12-14 06:28:16,876 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 960 transitions. Word has length 549 [2022-12-14 06:28:16,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:28:16,877 INFO L495 AbstractCegarLoop]: Abstraction has 956 states and 960 transitions. [2022-12-14 06:28:16,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 811 states, 811 states have (on average 1.0123304562268804) internal successors, (821), 810 states have internal predecessors, (821), 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 06:28:16,877 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 960 transitions. [2022-12-14 06:28:16,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2022-12-14 06:28:16,883 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:28:16,883 INFO L195 NwaCegarLoop]: trace histogram [808, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:28:16,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 06:28:17,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8868f9ba-3831-4907-b12d-c719c1409cca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:28:17,085 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:28:17,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:28:17,086 INFO L85 PathProgramCache]: Analyzing trace with hash -630583775, now seen corresponding path program 13 times [2022-12-14 06:28:17,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:28:17,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303036114] [2022-12-14 06:28:17,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:17,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:28:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat