./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 01:06:56,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:06:56,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:06:56,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:06:56,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:06:56,132 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:06:56,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:06:56,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:06:56,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:06:56,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:06:56,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:06:56,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:06:56,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:06:56,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:06:56,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:06:56,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:06:56,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:06:56,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:06:56,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:06:56,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:06:56,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:06:56,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:06:56,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:06:56,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:06:56,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:06:56,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:06:56,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:06:56,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:06:56,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:06:56,165 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:06:56,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:06:56,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:06:56,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:06:56,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:06:56,169 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:06:56,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:06:56,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:06:56,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:06:56,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:06:56,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:06:56,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:06:56,175 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 01:06:56,199 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:06:56,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:06:56,200 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:06:56,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:06:56,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:06:56,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:06:56,201 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:06:56,202 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:06:56,202 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:06:56,202 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:06:56,202 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:06:56,203 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:06:56,203 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:06:56,203 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:06:56,204 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:06:56,204 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:06:56,204 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:06:56,204 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:06:56,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:06:56,205 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:06:56,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:06:56,207 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:06:56,207 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:06:56,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:06:56,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:06:56,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:06:56,208 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:06:56,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:06:56,209 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:06:56,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:06:56,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:06:56,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:06:56,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:06:56,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:06:56,211 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:06:56,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:06:56,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:06:56,213 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:06:56,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:06:56,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:06:56,214 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:06:56,214 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_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac [2022-11-26 01:06:56,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:06:56,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:06:56,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:06:56,570 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:06:56,571 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:06:56,572 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/reducercommutativity/sep.i [2022-11-26 01:06:59,645 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:06:59,907 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:06:59,908 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/sv-benchmarks/c/reducercommutativity/sep.i [2022-11-26 01:06:59,915 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/data/272962bac/8104f837ca96493cbfd05d512a7f58e3/FLAG532529e1e [2022-11-26 01:06:59,931 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/data/272962bac/8104f837ca96493cbfd05d512a7f58e3 [2022-11-26 01:06:59,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:06:59,936 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:06:59,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:06:59,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:06:59,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:06:59,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:06:59" (1/1) ... [2022-11-26 01:06:59,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f740c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:06:59, skipping insertion in model container [2022-11-26 01:06:59,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:06:59" (1/1) ... [2022-11-26 01:06:59,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:06:59,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:07:00,134 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_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2022-11-26 01:07:00,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:07:00,149 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:07:00,172 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_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2022-11-26 01:07:00,173 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:07:00,188 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:07:00,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:00 WrapperNode [2022-11-26 01:07:00,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:07:00,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:07:00,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:07:00,190 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:07:00,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:00" (1/1) ... [2022-11-26 01:07:00,208 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:00" (1/1) ... [2022-11-26 01:07:00,241 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2022-11-26 01:07:00,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:07:00,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:07:00,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:07:00,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:07:00,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:00" (1/1) ... [2022-11-26 01:07:00,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:00" (1/1) ... [2022-11-26 01:07:00,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:00" (1/1) ... [2022-11-26 01:07:00,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:00" (1/1) ... [2022-11-26 01:07:00,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:00" (1/1) ... [2022-11-26 01:07:00,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:00" (1/1) ... [2022-11-26 01:07:00,268 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:00" (1/1) ... [2022-11-26 01:07:00,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:00" (1/1) ... [2022-11-26 01:07:00,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:07:00,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:07:00,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:07:00,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:07:00,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:00" (1/1) ... [2022-11-26 01:07:00,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:07:00,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:00,310 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:07:00,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:07:00,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:07:00,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:07:00,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 01:07:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 01:07:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:07:00,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:07:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 01:07:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 01:07:00,361 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-11-26 01:07:00,361 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-11-26 01:07:00,445 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:07:00,447 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:07:00,603 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:07:00,669 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:07:00,677 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-26 01:07:00,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:07:00 BoogieIcfgContainer [2022-11-26 01:07:00,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:07:00,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:07:00,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:07:00,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:07:00,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:06:59" (1/3) ... [2022-11-26 01:07:00,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36afdbaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:07:00, skipping insertion in model container [2022-11-26 01:07:00,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:00" (2/3) ... [2022-11-26 01:07:00,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36afdbaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:07:00, skipping insertion in model container [2022-11-26 01:07:00,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:07:00" (3/3) ... [2022-11-26 01:07:00,697 INFO L112 eAbstractionObserver]: Analyzing ICFG sep.i [2022-11-26 01:07:00,721 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:07:00,721 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:07:00,795 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:07:00,807 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;@146aa7f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:07:00,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:07:00,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 01:07:00,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 01:07:00,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:00,830 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:00,831 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:00,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:00,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1650253394, now seen corresponding path program 1 times [2022-11-26 01:07:00,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:00,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496755626] [2022-11-26 01:07:00,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:00,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 01:07:01,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:01,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496755626] [2022-11-26 01:07:01,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496755626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:01,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012325994] [2022-11-26 01:07:01,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:01,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:01,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:01,259 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:01,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:07:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:01,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:07:01,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 01:07:01,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:07:01,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012325994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:07:01,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:07:01,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-11-26 01:07:01,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080714267] [2022-11-26 01:07:01,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:07:01,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:07:01,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:01,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:07:01,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:07:01,615 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 01:07:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:01,748 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-11-26 01:07:01,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:07:01,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2022-11-26 01:07:01,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:01,763 INFO L225 Difference]: With dead ends: 36 [2022-11-26 01:07:01,764 INFO L226 Difference]: Without dead ends: 16 [2022-11-26 01:07:01,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:07:01,775 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:01,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 23 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:07:01,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-26 01:07:01,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-26 01:07:01,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 01:07:01,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-26 01:07:01,826 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 20 [2022-11-26 01:07:01,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:01,827 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-26 01:07:01,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 01:07:01,828 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-26 01:07:01,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 01:07:01,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:01,831 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:01,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:02,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-26 01:07:02,038 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:02,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:02,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1140555386, now seen corresponding path program 1 times [2022-11-26 01:07:02,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:02,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816727746] [2022-11-26 01:07:02,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:02,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 01:07:02,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:02,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816727746] [2022-11-26 01:07:02,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816727746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:07:02,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:07:02,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:07:02,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691467509] [2022-11-26 01:07:02,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:07:02,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:07:02,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:02,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:07:02,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:07:02,215 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 01:07:02,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:02,258 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-11-26 01:07:02,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:07:02,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-11-26 01:07:02,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:02,266 INFO L225 Difference]: With dead ends: 26 [2022-11-26 01:07:02,266 INFO L226 Difference]: Without dead ends: 17 [2022-11-26 01:07:02,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:07:02,268 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:02,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 18 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:07:02,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-26 01:07:02,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-26 01:07:02,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 01:07:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-26 01:07:02,275 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 23 [2022-11-26 01:07:02,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:02,276 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-26 01:07:02,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 01:07:02,277 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-26 01:07:02,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 01:07:02,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:02,283 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:02,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 01:07:02,283 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:02,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:02,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425358, now seen corresponding path program 1 times [2022-11-26 01:07:02,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:02,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036687160] [2022-11-26 01:07:02,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:02,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 01:07:02,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:02,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036687160] [2022-11-26 01:07:02,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036687160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:02,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329769081] [2022-11-26 01:07:02,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:02,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:02,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:02,544 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:02,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:07:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:02,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 01:07:02,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 01:07:02,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:07:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 01:07:02,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329769081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:07:02,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2066664666] [2022-11-26 01:07:02,884 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 01:07:02,884 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:07:02,888 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:07:02,907 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:07:02,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:07:03,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:03,079 INFO L321 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2022-11-26 01:07:03,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-11-26 01:07:03,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:03,123 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:07:03,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 01:07:03,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:07:03,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:03,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:03,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:03,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:03,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:07:03,465 INFO L321 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2022-11-26 01:07:03,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 307 treesize of output 289 [2022-11-26 01:07:03,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:03,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-26 01:07:04,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:04,034 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-26 01:07:04,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 83 [2022-11-26 01:07:04,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 01:07:04,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 01:07:04,361 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 17 for LOIs [2022-11-26 01:07:04,419 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:07:08,508 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '373#(and (<= ~N~0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4) |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 1 ~N~0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (exists ((v_sep_~ret~0_BEFORE_RETURN_5 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_sep_~ret~0_BEFORE_RETURN_5 4294967296) 2147483647) (mod v_sep_~ret~0_BEFORE_RETURN_5 4294967296) (+ (mod v_sep_~ret~0_BEFORE_RETURN_5 4294967296) (- 4294967296))))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-26 01:07:08,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:07:08,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:07:08,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2022-11-26 01:07:08,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068994579] [2022-11-26 01:07:08,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:07:08,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 01:07:08,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:08,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 01:07:08,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-11-26 01:07:08,511 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 01:07:08,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:08,597 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-11-26 01:07:08,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:07:08,598 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 24 [2022-11-26 01:07:08,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:08,598 INFO L225 Difference]: With dead ends: 32 [2022-11-26 01:07:08,598 INFO L226 Difference]: Without dead ends: 18 [2022-11-26 01:07:08,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-11-26 01:07:08,600 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:08,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 36 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:07:08,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-26 01:07:08,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-26 01:07:08,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 01:07:08,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-26 01:07:08,605 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 24 [2022-11-26 01:07:08,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:08,606 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-26 01:07:08,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 01:07:08,606 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-26 01:07:08,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-26 01:07:08,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:08,607 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:08,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:08,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-26 01:07:08,815 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:08,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:08,815 INFO L85 PathProgramCache]: Analyzing trace with hash -2012504714, now seen corresponding path program 2 times [2022-11-26 01:07:08,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:08,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775641272] [2022-11-26 01:07:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:08,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 01:07:18,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:18,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775641272] [2022-11-26 01:07:18,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775641272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:18,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455553752] [2022-11-26 01:07:18,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:07:18,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:18,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:18,015 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:18,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:07:18,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 01:07:18,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:07:18,201 WARN L261 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-26 01:07:18,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:19,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:19,138 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:07:19,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 73 [2022-11-26 01:07:23,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:24,283 INFO L321 Elim1Store]: treesize reduction 540, result has 29.0 percent of original size [2022-11-26 01:07:24,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 53 case distinctions, treesize of input 276 treesize of output 391 [2022-11-26 01:07:58,581 WARN L233 SmtUtils]: Spent 13.33s on a formula simplification. DAG size of input: 234 DAG size of output: 125 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:07:58,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:58,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:00,273 INFO L321 Elim1Store]: treesize reduction 340, result has 59.5 percent of original size [2022-11-26 01:08:00,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 2 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 383 treesize of output 759 [2022-11-26 01:09:41,524 WARN L233 SmtUtils]: Spent 37.02s on a formula simplification. DAG size of input: 367 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:09:42,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:09:42,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 288 treesize of output 352 [2022-11-26 01:09:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:09:48,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:09:49,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455553752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:09:49,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1658062047] [2022-11-26 01:09:49,575 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 01:09:49,576 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:09:49,576 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:09:49,576 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:09:49,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:09:49,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:49,622 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:09:49,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 01:09:49,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:49,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-26 01:09:49,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:09:49,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:49,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:49,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:49,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:49,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:09:49,805 INFO L321 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2022-11-26 01:09:49,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 307 treesize of output 289 [2022-11-26 01:09:50,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:50,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:09:50,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 01:09:50,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:50,111 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 01:09:50,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-26 01:09:50,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 01:09:50,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 01:09:50,307 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 17 for LOIs [2022-11-26 01:09:50,345 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:09:55,315 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '595#(and (<= ~N~0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4) |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 1 ~N~0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (exists ((v_sep_~ret~0_BEFORE_RETURN_12 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_sep_~ret~0_BEFORE_RETURN_12 4294967296) 2147483647) (mod v_sep_~ret~0_BEFORE_RETURN_12 4294967296) (+ (mod v_sep_~ret~0_BEFORE_RETURN_12 4294967296) (- 4294967296))))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:09:55,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:09:55,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:09:55,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25] total 41 [2022-11-26 01:09:55,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659796425] [2022-11-26 01:09:55,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:09:55,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-26 01:09:55,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:55,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-26 01:09:55,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2750, Unknown=0, NotChecked=0, Total=2970 [2022-11-26 01:09:55,320 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 41 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-26 01:09:57,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:09:59,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:10:03,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:10:11,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:10:12,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:10:14,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:10:16,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:16,271 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2022-11-26 01:10:16,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 01:10:16,272 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2022-11-26 01:10:16,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:16,275 INFO L225 Difference]: With dead ends: 51 [2022-11-26 01:10:16,275 INFO L226 Difference]: Without dead ends: 47 [2022-11-26 01:10:16,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 71.8s TimeCoverageRelationStatistics Valid=354, Invalid=3936, Unknown=0, NotChecked=0, Total=4290 [2022-11-26 01:10:16,278 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 65 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 30 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:16,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 129 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 690 Invalid, 6 Unknown, 0 Unchecked, 12.8s Time] [2022-11-26 01:10:16,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-26 01:10:16,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-11-26 01:10:16,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-26 01:10:16,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2022-11-26 01:10:16,297 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 27 [2022-11-26 01:10:16,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:16,297 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2022-11-26 01:10:16,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-26 01:10:16,298 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2022-11-26 01:10:16,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 01:10:16,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:16,299 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:10:16,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:16,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:16,505 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:16,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:16,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1934707082, now seen corresponding path program 3 times [2022-11-26 01:10:16,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:16,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707894341] [2022-11-26 01:10:16,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:16,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 01:10:16,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:16,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707894341] [2022-11-26 01:10:16,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707894341] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:16,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686925711] [2022-11-26 01:10:16,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:10:16,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:16,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:16,665 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:16,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:10:16,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:10:16,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:10:16,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 01:10:16,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 01:10:16,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:10:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-26 01:10:17,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686925711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:10:17,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1476384543] [2022-11-26 01:10:17,037 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 01:10:17,037 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:10:17,038 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:10:17,038 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:10:17,038 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:10:17,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:17,088 INFO L321 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2022-11-26 01:10:17,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-11-26 01:10:17,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:17,124 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:10:17,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 01:10:17,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:17,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:17,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:17,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:17,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:17,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:17,284 INFO L321 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2022-11-26 01:10:17,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 307 treesize of output 289 [2022-11-26 01:10:17,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:17,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:17,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 01:10:17,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:17,603 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 01:10:17,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-26 01:10:17,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 01:10:17,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 01:10:17,798 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 17 for LOIs [2022-11-26 01:10:17,838 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:10:21,892 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '942#(and (<= ~N~0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4) |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 1 ~N~0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (exists ((v_sep_~ret~0_BEFORE_RETURN_18 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_sep_~ret~0_BEFORE_RETURN_18 4294967296) 2147483647) (mod v_sep_~ret~0_BEFORE_RETURN_18 4294967296) (+ (mod v_sep_~ret~0_BEFORE_RETURN_18 4294967296) (- 4294967296))))) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:10:21,893 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:10:21,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:10:21,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 17 [2022-11-26 01:10:21,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006329986] [2022-11-26 01:10:21,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:10:21,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 01:10:21,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:21,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 01:10:21,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-11-26 01:10:21,895 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 01:10:22,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:22,300 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2022-11-26 01:10:22,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 01:10:22,301 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2022-11-26 01:10:22,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:22,302 INFO L225 Difference]: With dead ends: 62 [2022-11-26 01:10:22,302 INFO L226 Difference]: Without dead ends: 24 [2022-11-26 01:10:22,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2022-11-26 01:10:22,304 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:22,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 118 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:10:22,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-26 01:10:22,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2022-11-26 01:10:22,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 01:10:22,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-26 01:10:22,316 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 28 [2022-11-26 01:10:22,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:22,316 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-26 01:10:22,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 01:10:22,317 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-26 01:10:22,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-26 01:10:22,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:22,317 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:10:22,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:22,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:22,528 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:22,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:22,529 INFO L85 PathProgramCache]: Analyzing trace with hash -81417082, now seen corresponding path program 4 times [2022-11-26 01:10:22,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:22,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987747053] [2022-11-26 01:10:22,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:22,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 3 proven. 63 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 01:10:39,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:39,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987747053] [2022-11-26 01:10:39,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987747053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:39,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276625609] [2022-11-26 01:10:39,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 01:10:39,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:39,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:39,411 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:39,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:10:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:39,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-26 01:10:39,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:40,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:40,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:40,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:40,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:40,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 349 treesize of output 202 [2022-11-26 01:10:44,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:44,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:44,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:44,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:44,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:44,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:44,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:44,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:44,176 INFO L321 Elim1Store]: treesize reduction 6, result has 14.3 percent of original size [2022-11-26 01:10:44,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 548 treesize of output 367 [2022-11-26 01:10:45,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:45,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:45,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:45,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:45,301 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-26 01:10:45,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 477 treesize of output 344 [2022-11-26 01:10:46,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:46,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:46,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:46,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:46,320 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:46,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 455 treesize of output 362 [2022-11-26 01:10:49,542 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|aux_div_aux_mod_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65_72| Int)) (let ((.cse0 (* |aux_div_aux_mod_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65_72| 4))) (and (< .cse0 4) (<= 0 .cse0) (exists ((|aux_div_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65| Int)) (and (<= (+ |aux_div_aux_mod_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65_72| |aux_div_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65|) 0) (< 0 (+ |aux_div_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65| 1)) (exists ((|v_ULTIMATE.start_main_~#x~0#1.base_BEFORE_CALL_31| Int)) (let ((.cse1 (+ (select (select |c_#memory_int| |v_ULTIMATE.start_main_~#x~0#1.base_BEFORE_CALL_31|) (+ (* (- 4) |aux_div_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65|) (* |aux_div_aux_mod_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65_72| (- 4)) 4)) 1))) (<= .cse1 (* (div .cse1 2) 2))))))))) (exists ((|aux_div_aux_mod_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65_72| Int)) (let ((.cse2 (* |aux_div_aux_mod_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65_72| 4))) (and (< .cse2 4) (<= 0 .cse2) (exists ((|aux_div_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65| Int)) (and (<= (+ |aux_div_aux_mod_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65_72| |aux_div_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65|) 0) (< 0 (+ |aux_div_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65| 1)) (exists ((|v_ULTIMATE.start_main_~#x~0#1.base_BEFORE_CALL_31| Int)) (let ((.cse3 (select (select |c_#memory_int| |v_ULTIMATE.start_main_~#x~0#1.base_BEFORE_CALL_31|) (+ (* (- 4) |aux_div_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65|) (* |aux_div_aux_mod_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65_72| (- 4)) 4)))) (<= .cse3 (* (div .cse3 2) 2)))))))))) is different from true [2022-11-26 01:11:01,838 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:11:14,234 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:11:29,128 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:11:41,825 WARN L233 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:11:52,728 WARN L233 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:11:52,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:52,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:52,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:53,202 INFO L321 Elim1Store]: treesize reduction 47, result has 79.7 percent of original size [2022-11-26 01:11:53,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1128 treesize of output 684 [2022-11-26 01:11:54,442 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-26 01:11:54,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:25,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1108 treesize of output 916 [2022-11-26 01:12:25,735 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:25,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 712 treesize of output 1 [2022-11-26 01:12:41,765 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:41,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 4379 treesize of output 3667 [2022-11-26 01:12:49,141 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:49,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 2848 treesize of output 2373 [2022-11-26 01:12:56,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:56,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:56,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:56,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:56,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:56,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 2849 treesize of output 2257 [2022-11-26 01:12:56,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:56,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:56,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 2836 treesize of output 2292 [2022-11-26 01:12:57,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 2304 treesize of output 2256 [2022-11-26 01:12:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 68 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 01:12:57,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276625609] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:12:57,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1822351382] [2022-11-26 01:12:57,334 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 01:12:57,334 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:12:57,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:12:57,335 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:12:57,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:12:57,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:57,373 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:12:57,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 01:12:57,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:57,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-26 01:12:57,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:57,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:57,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:57,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:57,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:57,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:57,539 INFO L321 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2022-11-26 01:12:57,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 307 treesize of output 289 [2022-11-26 01:12:57,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:57,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-26 01:12:57,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:57,812 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-26 01:12:57,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 83 [2022-11-26 01:12:57,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 01:12:57,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 01:12:58,042 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 82 for LOIs [2022-11-26 01:12:58,075 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:13:02,148 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1363#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= ~N~0 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 1 ~N~0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:13:02,148 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:13:02,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:13:02,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28, 26] total 70 [2022-11-26 01:13:02,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961426199] [2022-11-26 01:13:02,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:13:02,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-26 01:13:02,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:13:02,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-26 01:13:02,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=6121, Unknown=11, NotChecked=158, Total=6642 [2022-11-26 01:13:02,155 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 70 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 60 states have internal predecessors, (67), 8 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-26 01:13:04,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:06,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:08,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:10,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:12,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:14,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:22,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:24,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:26,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:28,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:32,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:34,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:50,904 WARN L233 SmtUtils]: Spent 6.64s on a formula simplification. DAG size of input: 217 DAG size of output: 163 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:14:37,430 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:14:46,159 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:15:02,605 WARN L233 SmtUtils]: Spent 16.10s on a formula simplification. DAG size of input: 73 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:15:19,035 WARN L233 SmtUtils]: Spent 16.16s on a formula simplification. DAG size of input: 92 DAG size of output: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:15:39,562 WARN L233 SmtUtils]: Spent 16.25s on a formula simplification. DAG size of input: 118 DAG size of output: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:15:56,672 WARN L233 SmtUtils]: Spent 14.85s on a formula simplification. DAG size of input: 162 DAG size of output: 114 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:16:08,343 WARN L233 SmtUtils]: Spent 8.69s on a formula simplification. DAG size of input: 233 DAG size of output: 177 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:16:19,050 WARN L233 SmtUtils]: Spent 7.94s on a formula simplification. DAG size of input: 233 DAG size of output: 177 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:16:20,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:16:20,328 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2022-11-26 01:16:20,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-26 01:16:20,329 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 60 states have internal predecessors, (67), 8 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 31 [2022-11-26 01:16:20,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:16:20,330 INFO L225 Difference]: With dead ends: 64 [2022-11-26 01:16:20,330 INFO L226 Difference]: Without dead ends: 59 [2022-11-26 01:16:20,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 97 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3345 ImplicationChecksByTransitivity, 263.1s TimeCoverageRelationStatistics Valid=593, Invalid=8877, Unknown=40, NotChecked=192, Total=9702 [2022-11-26 01:16:20,334 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 56 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 44 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 31.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:16:20,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 125 Invalid, 1626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1520 Invalid, 12 Unknown, 50 Unchecked, 31.0s Time] [2022-11-26 01:16:20,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-26 01:16:20,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2022-11-26 01:16:20,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-26 01:16:20,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2022-11-26 01:16:20,368 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 31 [2022-11-26 01:16:20,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:16:20,369 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2022-11-26 01:16:20,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 60 states have internal predecessors, (67), 8 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-26 01:16:20,369 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2022-11-26 01:16:20,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-26 01:16:20,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:16:20,371 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:16:20,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:16:20,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:16:20,578 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:16:20,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:16:20,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1668881530, now seen corresponding path program 5 times [2022-11-26 01:16:20,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:16:20,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598235456] [2022-11-26 01:16:20,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:16:20,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:16:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:16:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 27 proven. 47 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 01:16:20,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:16:20,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598235456] [2022-11-26 01:16:20,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598235456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:16:20,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095198509] [2022-11-26 01:16:20,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:16:20,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:16:20,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:16:20,788 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:16:20,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:16:20,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 01:16:20,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:16:20,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:16:20,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:16:21,048 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 01:16:21,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:16:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 01:16:21,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095198509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:16:21,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [822241173] [2022-11-26 01:16:21,275 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 01:16:21,275 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:16:21,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:16:21,276 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:16:21,276 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:16:21,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:16:21,316 INFO L321 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2022-11-26 01:16:21,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-11-26 01:16:21,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:16:21,355 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:16:21,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 01:16:21,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:16:21,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:16:21,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:16:21,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:16:21,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:16:21,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:16:21,536 INFO L321 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2022-11-26 01:16:21,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 307 treesize of output 289 [2022-11-26 01:16:21,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:16:21,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:16:21,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 01:16:21,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:16:21,808 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 01:16:21,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-26 01:16:21,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 01:16:21,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 01:16:21,995 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 17 for LOIs [2022-11-26 01:16:22,035 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:16:28,123 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1801#(and (<= ~N~0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4) |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 1 ~N~0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:16:28,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:16:28,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:16:28,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 22 [2022-11-26 01:16:28,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811262471] [2022-11-26 01:16:28,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:16:28,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-26 01:16:28,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:16:28,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-26 01:16:28,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1037, Unknown=1, NotChecked=0, Total=1190 [2022-11-26 01:16:28,126 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 01:16:28,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:16:28,648 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-11-26 01:16:28,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-26 01:16:28,648 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 32 [2022-11-26 01:16:28,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:16:28,649 INFO L225 Difference]: With dead ends: 79 [2022-11-26 01:16:28,650 INFO L226 Difference]: Without dead ends: 48 [2022-11-26 01:16:28,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=336, Invalid=2419, Unknown=1, NotChecked=0, Total=2756 [2022-11-26 01:16:28,652 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:16:28,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 211 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:16:28,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-26 01:16:28,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2022-11-26 01:16:28,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-26 01:16:28,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-11-26 01:16:28,671 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 32 [2022-11-26 01:16:28,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:16:28,671 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-11-26 01:16:28,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 01:16:28,672 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-11-26 01:16:28,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-26 01:16:28,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:16:28,673 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:16:28,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-26 01:16:28,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:16:28,878 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:16:28,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:16:28,878 INFO L85 PathProgramCache]: Analyzing trace with hash -847079546, now seen corresponding path program 6 times [2022-11-26 01:16:28,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:16:28,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543449395] [2022-11-26 01:16:28,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:16:28,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:16:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:16:29,114 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 01:16:29,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:16:29,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543449395] [2022-11-26 01:16:29,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543449395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:16:29,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990968589] [2022-11-26 01:16:29,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:16:29,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:16:29,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:16:29,119 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:16:29,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:16:29,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:16:29,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:16:29,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 01:16:29,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:16:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 22 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 01:16:29,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:16:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 01:16:29,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990968589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:16:29,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1095371922] [2022-11-26 01:16:29,690 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 01:16:29,690 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:16:29,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:16:29,691 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:16:29,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:16:29,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:16:29,740 INFO L321 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2022-11-26 01:16:29,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-11-26 01:16:29,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:16:29,775 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:16:29,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 01:16:29,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:16:29,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:16:29,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:16:29,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:16:29,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:16:29,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:16:29,922 INFO L321 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2022-11-26 01:16:29,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 307 treesize of output 289 [2022-11-26 01:16:30,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:16:30,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-26 01:16:30,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:16:30,206 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-26 01:16:30,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 83 [2022-11-26 01:16:30,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 01:16:30,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 01:16:30,412 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 17 for LOIs [2022-11-26 01:16:30,452 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:16:34,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2292#(and (<= ~N~0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4) |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (exists ((v_sep_~ret~0_BEFORE_RETURN_35 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_sep_~ret~0_BEFORE_RETURN_35 4294967296) 2147483647) (mod v_sep_~ret~0_BEFORE_RETURN_35 4294967296) (+ (mod v_sep_~ret~0_BEFORE_RETURN_35 4294967296) (- 4294967296))))) (<= 1 ~N~0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:16:34,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:16:34,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:16:34,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 28 [2022-11-26 01:16:34,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033832723] [2022-11-26 01:16:34,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:16:34,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-26 01:16:34,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:16:34,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-26 01:16:34,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2022-11-26 01:16:34,606 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 01:16:35,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:16:35,123 INFO L93 Difference]: Finished difference Result 91 states and 118 transitions. [2022-11-26 01:16:35,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-26 01:16:35,127 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 35 [2022-11-26 01:16:35,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:16:35,128 INFO L225 Difference]: With dead ends: 91 [2022-11-26 01:16:35,128 INFO L226 Difference]: Without dead ends: 55 [2022-11-26 01:16:35,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=492, Invalid=2814, Unknown=0, NotChecked=0, Total=3306 [2022-11-26 01:16:35,130 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:16:35,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 91 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:16:35,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-26 01:16:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2022-11-26 01:16:35,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-26 01:16:35,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-11-26 01:16:35,147 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 35 [2022-11-26 01:16:35,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:16:35,147 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-11-26 01:16:35,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 01:16:35,148 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-11-26 01:16:35,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-26 01:16:35,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:16:35,149 INFO L195 NwaCegarLoop]: trace histogram [12, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:16:35,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-26 01:16:35,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:16:35,354 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:16:35,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:16:35,354 INFO L85 PathProgramCache]: Analyzing trace with hash 2032146550, now seen corresponding path program 7 times [2022-11-26 01:16:35,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:16:35,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394726257] [2022-11-26 01:16:35,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:16:35,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:16:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:17:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 01:17:34,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:17:34,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394726257] [2022-11-26 01:17:34,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394726257] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:17:34,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755901663] [2022-11-26 01:17:34,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 01:17:34,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:17:34,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:17:34,355 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:17:34,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_917cc17e-0bfa-4c22-acaa-a3bfd1983e3d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 01:17:34,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:17:34,551 WARN L261 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 122 conjunts are in the unsatisfiable core [2022-11-26 01:17:34,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:17:37,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:37,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:37,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:37,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:17:37,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 459 treesize of output 303 [2022-11-26 01:17:42,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:42,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:42,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:17:42,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:42,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:42,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:42,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:42,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:17:42,369 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-26 01:17:42,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 880 treesize of output 597 [2022-11-26 01:17:43,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:43,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:43,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:43,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:17:43,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:43,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:43,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:43,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:17:43,720 INFO L321 Elim1Store]: treesize reduction 4, result has 42.9 percent of original size [2022-11-26 01:17:43,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 793 treesize of output 600 [2022-11-26 01:17:44,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:44,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:44,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:44,997 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:17:44,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 739 treesize of output 574 [2022-11-26 01:17:46,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:17:46,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:46,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:46,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:46,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:46,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:46,319 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:17:46,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 736 treesize of output 586 [2022-11-26 01:17:49,804 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:17:49,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1165 treesize of output 805 [2022-11-26 01:17:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 5 proven. 106 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 01:17:50,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:20:26,577 WARN L233 SmtUtils]: Spent 5.78s on a formula simplification that was a NOOP. DAG size: 417 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:20:30,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2931 treesize of output 2401 [2022-11-26 01:20:30,905 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:20:30,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1569 treesize of output 1 [2022-11-26 01:20:58,267 WARN L233 SmtUtils]: Spent 5.37s on a formula simplification that was a NOOP. DAG size: 316 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)