./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array22_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array22_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P --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 31d323b6985f030ac0fb5fda45d0cb8af14c3bb3898c8ff09cf5a292e40f357b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:51:36,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:51:36,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:51:36,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:51:36,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:51:36,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:51:36,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:51:36,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:51:36,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:51:36,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:51:36,204 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:51:36,206 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:51:36,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:51:36,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:51:36,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:51:36,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:51:36,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:51:36,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:51:36,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:51:36,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:51:36,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:51:36,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:51:36,227 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:51:36,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:51:36,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:51:36,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:51:36,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:51:36,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:51:36,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:51:36,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:51:36,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:51:36,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:51:36,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:51:36,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:51:36,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:51:36,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:51:36,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:51:36,249 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:51:36,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:51:36,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:51:36,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:51:36,252 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 22:51:36,308 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:51:36,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:51:36,309 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:51:36,310 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:51:36,311 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:51:36,311 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:51:36,311 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:51:36,312 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:51:36,312 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:51:36,312 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:51:36,313 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:51:36,314 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:51:36,314 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:51:36,314 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:51:36,314 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:51:36,314 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:51:36,315 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:51:36,315 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:51:36,316 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:51:36,316 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:51:36,316 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:51:36,317 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:51:36,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:51:36,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 22:51:36,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:51:36,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 22:51:36,319 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:51:36,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 22:51:36,320 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:51:36,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 22:51:36,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:51:36,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:51:36,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:51:36,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:51:36,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:51:36,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 22:51:36,321 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:51:36,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:51:36,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 22:51:36,322 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:51:36,322 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:51:36,322 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31d323b6985f030ac0fb5fda45d0cb8af14c3bb3898c8ff09cf5a292e40f357b [2021-11-20 22:51:36,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:51:36,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:51:36,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:51:36,639 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:51:36,640 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:51:36,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-patterns/array22_pattern.c [2021-11-20 22:51:36,706 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/data/52c118b03/ab204273880d44fcaaddcd3867b53191/FLAG632926bb7 [2021-11-20 22:51:37,172 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:51:37,173 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/sv-benchmarks/c/array-patterns/array22_pattern.c [2021-11-20 22:51:37,187 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/data/52c118b03/ab204273880d44fcaaddcd3867b53191/FLAG632926bb7 [2021-11-20 22:51:37,533 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/data/52c118b03/ab204273880d44fcaaddcd3867b53191 [2021-11-20 22:51:37,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:51:37,542 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:51:37,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:51:37,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:51:37,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:51:37,549 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:51:37" (1/1) ... [2021-11-20 22:51:37,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@210fb0c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:37, skipping insertion in model container [2021-11-20 22:51:37,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:51:37" (1/1) ... [2021-11-20 22:51:37,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:51:37,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:51:37,746 WARN L230 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_c9b87b66-72f7-4843-a5b8-29dafb4579d6/sv-benchmarks/c/array-patterns/array22_pattern.c[1347,1360] [2021-11-20 22:51:37,769 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:51:37,777 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:51:37,789 WARN L230 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_c9b87b66-72f7-4843-a5b8-29dafb4579d6/sv-benchmarks/c/array-patterns/array22_pattern.c[1347,1360] [2021-11-20 22:51:37,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:51:37,816 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:51:37,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:37 WrapperNode [2021-11-20 22:51:37,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:51:37,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:51:37,818 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:51:37,818 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:51:37,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:37" (1/1) ... [2021-11-20 22:51:37,834 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:37" (1/1) ... [2021-11-20 22:51:37,858 INFO L137 Inliner]: procedures = 17, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2021-11-20 22:51:37,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:51:37,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:51:37,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:51:37,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:51:37,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:37" (1/1) ... [2021-11-20 22:51:37,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:37" (1/1) ... [2021-11-20 22:51:37,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:37" (1/1) ... [2021-11-20 22:51:37,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:37" (1/1) ... [2021-11-20 22:51:37,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:37" (1/1) ... [2021-11-20 22:51:37,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:37" (1/1) ... [2021-11-20 22:51:37,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:37" (1/1) ... [2021-11-20 22:51:37,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:51:37,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:51:37,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:51:37,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:51:37,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:37" (1/1) ... [2021-11-20 22:51:37,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:51:37,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:37,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:51:37,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:51:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2021-11-20 22:51:37,988 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2021-11-20 22:51:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:51:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 22:51:37,989 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 22:51:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 22:51:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 22:51:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 22:51:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:51:37,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:51:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 22:51:37,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 22:51:38,090 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:51:38,091 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:51:38,373 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:51:38,441 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:51:38,441 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-20 22:51:38,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:51:38 BoogieIcfgContainer [2021-11-20 22:51:38,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:51:38,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:51:38,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:51:38,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:51:38,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:51:37" (1/3) ... [2021-11-20 22:51:38,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce03d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:51:38, skipping insertion in model container [2021-11-20 22:51:38,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:37" (2/3) ... [2021-11-20 22:51:38,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce03d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:51:38, skipping insertion in model container [2021-11-20 22:51:38,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:51:38" (3/3) ... [2021-11-20 22:51:38,453 INFO L111 eAbstractionObserver]: Analyzing ICFG array22_pattern.c [2021-11-20 22:51:38,457 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:51:38,458 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 22:51:38,503 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:51:38,511 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 22:51:38,511 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 22:51:38,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 22:51:38,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 22:51:38,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:38,534 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:38,534 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:38,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:38,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1938318667, now seen corresponding path program 1 times [2021-11-20 22:51:38,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:38,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13333851] [2021-11-20 22:51:38,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:38,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:38,624 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:51:38,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237311472] [2021-11-20 22:51:38,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:38,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:38,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:38,640 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:38,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 22:51:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:38,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 22:51:38,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:38,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:51:38,812 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:38,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13333851] [2021-11-20 22:51:38,813 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:51:38,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237311472] [2021-11-20 22:51:38,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237311472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:38,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:38,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:51:38,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126235016] [2021-11-20 22:51:38,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:38,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 22:51:38,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:38,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 22:51:38,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 22:51:38,859 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 22:51:38,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:38,962 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2021-11-20 22:51:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 22:51:38,965 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-20 22:51:38,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:38,974 INFO L225 Difference]: With dead ends: 33 [2021-11-20 22:51:38,975 INFO L226 Difference]: Without dead ends: 23 [2021-11-20 22:51:38,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 22:51:38,982 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:38,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:51:39,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-20 22:51:39,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-20 22:51:39,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 22:51:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-11-20 22:51:39,044 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 11 [2021-11-20 22:51:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:39,047 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-11-20 22:51:39,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 22:51:39,048 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-11-20 22:51:39,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 22:51:39,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:39,050 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:39,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:39,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-20 22:51:39,251 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:39,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:39,251 INFO L85 PathProgramCache]: Analyzing trace with hash -651899950, now seen corresponding path program 1 times [2021-11-20 22:51:39,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:39,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579648994] [2021-11-20 22:51:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:39,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:39,266 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:51:39,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073689053] [2021-11-20 22:51:39,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:39,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:39,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:39,268 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:39,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 22:51:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:39,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:51:39,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 22:51:39,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:51:39,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:39,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579648994] [2021-11-20 22:51:39,474 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:51:39,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073689053] [2021-11-20 22:51:39,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073689053] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:39,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:39,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:51:39,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666515229] [2021-11-20 22:51:39,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:39,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:51:39,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:39,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:51:39,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:39,477 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 22:51:39,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:39,524 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2021-11-20 22:51:39,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:51:39,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2021-11-20 22:51:39,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:39,525 INFO L225 Difference]: With dead ends: 28 [2021-11-20 22:51:39,525 INFO L226 Difference]: Without dead ends: 25 [2021-11-20 22:51:39,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:39,528 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:39,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 46 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:51:39,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-20 22:51:39,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-20 22:51:39,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 22:51:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2021-11-20 22:51:39,537 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 26 [2021-11-20 22:51:39,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:39,537 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2021-11-20 22:51:39,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 22:51:39,537 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2021-11-20 22:51:39,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 22:51:39,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:39,539 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:39,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:39,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:39,767 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:39,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:39,768 INFO L85 PathProgramCache]: Analyzing trace with hash -741748724, now seen corresponding path program 1 times [2021-11-20 22:51:39,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:39,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358949736] [2021-11-20 22:51:39,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:39,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:39,779 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:51:39,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035695557] [2021-11-20 22:51:39,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:39,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:39,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:39,783 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:39,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 22:51:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:39,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:51:39,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 22:51:40,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:51:40,045 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:40,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358949736] [2021-11-20 22:51:40,045 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:51:40,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035695557] [2021-11-20 22:51:40,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035695557] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:40,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:40,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:51:40,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900648135] [2021-11-20 22:51:40,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:40,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:51:40,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:40,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:51:40,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:40,048 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 22:51:40,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:40,167 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2021-11-20 22:51:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:51:40,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2021-11-20 22:51:40,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:40,170 INFO L225 Difference]: With dead ends: 51 [2021-11-20 22:51:40,171 INFO L226 Difference]: Without dead ends: 30 [2021-11-20 22:51:40,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:51:40,175 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:40,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:51:40,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-20 22:51:40,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-11-20 22:51:40,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 22:51:40,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2021-11-20 22:51:40,197 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 29 [2021-11-20 22:51:40,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:40,198 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2021-11-20 22:51:40,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 22:51:40,199 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2021-11-20 22:51:40,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 22:51:40,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:40,201 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:40,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:40,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:40,427 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:40,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:40,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1070521775, now seen corresponding path program 1 times [2021-11-20 22:51:40,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:40,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870141734] [2021-11-20 22:51:40,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:40,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:40,438 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:51:40,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015967537] [2021-11-20 22:51:40,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:40,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:40,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:40,455 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:40,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 22:51:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:40,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:51:40,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 22:51:40,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:51:40,610 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:40,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870141734] [2021-11-20 22:51:40,611 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:51:40,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015967537] [2021-11-20 22:51:40,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015967537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:40,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:40,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:51:40,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758056114] [2021-11-20 22:51:40,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:40,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:51:40,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:40,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:51:40,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:40,618 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 22:51:40,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:40,684 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2021-11-20 22:51:40,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:51:40,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2021-11-20 22:51:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:40,686 INFO L225 Difference]: With dead ends: 50 [2021-11-20 22:51:40,686 INFO L226 Difference]: Without dead ends: 28 [2021-11-20 22:51:40,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:40,687 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:40,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 39 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:51:40,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-20 22:51:40,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-20 22:51:40,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 22:51:40,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-11-20 22:51:40,694 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 31 [2021-11-20 22:51:40,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:40,695 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-11-20 22:51:40,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 22:51:40,695 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-11-20 22:51:40,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 22:51:40,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:40,696 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:40,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:40,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:40,911 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:40,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:40,911 INFO L85 PathProgramCache]: Analyzing trace with hash 272504613, now seen corresponding path program 1 times [2021-11-20 22:51:40,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:40,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907533252] [2021-11-20 22:51:40,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:40,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:40,923 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:51:40,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274717837] [2021-11-20 22:51:40,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:40,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:40,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:40,926 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:40,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 22:51:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:40,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 22:51:40,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 22:51:41,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 22:51:41,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:41,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907533252] [2021-11-20 22:51:41,182 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:51:41,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274717837] [2021-11-20 22:51:41,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274717837] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:51:41,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [817742832] [2021-11-20 22:51:41,200 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-20 22:51:41,201 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:51:41,205 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:51:41,210 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:51:41,210 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:51:41,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:41,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:41,711 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 22:51:41,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 22:51:41,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:41,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:41,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 89 [2021-11-20 22:51:41,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:41,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 44 treesize of output 34 [2021-11-20 22:51:42,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:42,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:42,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2021-11-20 22:51:42,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:42,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 21 [2021-11-20 22:51:42,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:42,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:42,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:42,534 INFO L354 Elim1Store]: treesize reduction 224, result has 23.5 percent of original size [2021-11-20 22:51:42,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 280 treesize of output 328 [2021-11-20 22:51:43,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 41 [2021-11-20 22:51:43,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:43,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 38 [2021-11-20 22:51:44,706 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:44,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 19 [2021-11-20 22:51:45,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:45,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:45,274 INFO L354 Elim1Store]: treesize reduction 100, result has 13.0 percent of original size [2021-11-20 22:51:45,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 150 treesize of output 168 [2021-11-20 22:51:45,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:45,399 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-20 22:51:45,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 102 [2021-11-20 22:51:45,855 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:45,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 19 [2021-11-20 22:51:45,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:45,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 19 [2021-11-20 22:51:46,120 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:46,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 19 [2021-11-20 22:51:46,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:46,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:46,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 116 [2021-11-20 22:51:46,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:46,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 91 treesize of output 41 [2021-11-20 22:51:46,398 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:46,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 19 [2021-11-20 22:51:47,675 INFO L354 Elim1Store]: treesize reduction 162, result has 27.4 percent of original size [2021-11-20 22:51:47,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 164 [2021-11-20 22:51:47,853 INFO L354 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2021-11-20 22:51:47,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 69 treesize of output 37 [2021-11-20 22:51:48,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:48,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:48,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:48,301 INFO L354 Elim1Store]: treesize reduction 786, result has 20.0 percent of original size [2021-11-20 22:51:48,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 372 treesize of output 628 [2021-11-20 22:51:48,576 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:48,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:48,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:48,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:48,656 INFO L354 Elim1Store]: treesize reduction 132, result has 7.0 percent of original size [2021-11-20 22:51:48,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 268 treesize of output 160 [2021-11-20 22:51:48,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:48,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:48,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:48,819 INFO L354 Elim1Store]: treesize reduction 121, result has 14.8 percent of original size [2021-11-20 22:51:48,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 271 treesize of output 172 [2021-11-20 22:51:48,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:48,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:48,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:48,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:51:48,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 305 treesize of output 283 [2021-11-20 22:51:49,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:49,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:49,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:49,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:51:49,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 305 treesize of output 352 [2021-11-20 22:51:49,143 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:49,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:49,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:49,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:49,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 248 treesize of output 109 [2021-11-20 22:51:49,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:49,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 195 treesize of output 150 [2021-11-20 22:51:51,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-20 22:51:51,124 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:51,213 INFO L354 Elim1Store]: treesize reduction 116, result has 28.8 percent of original size [2021-11-20 22:51:51,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 124 [2021-11-20 22:51:51,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 3 [2021-11-20 22:51:51,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:51,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 37 treesize of output 7 [2021-11-20 22:51:51,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 19 [2021-11-20 22:51:51,514 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:51,625 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 17 for LOIs [2021-11-20 22:51:51,653 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 21 for LOIs [2021-11-20 22:51:51,690 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:51:53,303 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:51:53,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:51:53,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-20 22:51:53,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654527398] [2021-11-20 22:51:53,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 22:51:53,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 22:51:53,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:53,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 22:51:53,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-11-20 22:51:53,305 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 22:51:53,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:53,415 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2021-11-20 22:51:53,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:51:53,416 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 32 [2021-11-20 22:51:53,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:53,417 INFO L225 Difference]: With dead ends: 54 [2021-11-20 22:51:53,417 INFO L226 Difference]: Without dead ends: 31 [2021-11-20 22:51:53,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-11-20 22:51:53,418 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:53,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 45 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:51:53,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-20 22:51:53,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-20 22:51:53,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 22:51:53,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-11-20 22:51:53,425 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 32 [2021-11-20 22:51:53,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:53,425 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-11-20 22:51:53,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 22:51:53,426 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-11-20 22:51:53,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 22:51:53,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:53,427 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:53,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:53,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:53,644 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:53,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:53,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1994024419, now seen corresponding path program 2 times [2021-11-20 22:51:53,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:53,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984997553] [2021-11-20 22:51:53,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:53,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:53,658 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:51:53,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186352919] [2021-11-20 22:51:53,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 22:51:53,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:53,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:53,663 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:53,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 22:51:53,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 22:51:53,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:51:53,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 22:51:53,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 22:51:53,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 22:51:54,047 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:54,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984997553] [2021-11-20 22:51:54,047 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:51:54,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186352919] [2021-11-20 22:51:54,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186352919] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:51:54,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1106671253] [2021-11-20 22:51:54,051 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-20 22:51:54,051 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:51:54,052 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:51:54,052 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:51:54,052 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:51:54,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:54,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:54,404 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-20 22:51:54,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 105 [2021-11-20 22:51:54,446 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:54,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:54,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:51:54,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 110 [2021-11-20 22:51:54,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:54,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:54,847 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 22:51:54,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 22:51:55,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:55,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:55,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 84 [2021-11-20 22:51:55,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:55,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-11-20 22:51:55,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:55,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:55,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:55,527 INFO L354 Elim1Store]: treesize reduction 220, result has 20.6 percent of original size [2021-11-20 22:51:55,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 278 treesize of output 316 [2021-11-20 22:51:55,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:55,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:55,888 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-11-20 22:51:55,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 230 treesize of output 189 [2021-11-20 22:51:56,795 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:56,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 19 [2021-11-20 22:51:57,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:57,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:57,269 INFO L354 Elim1Store]: treesize reduction 100, result has 13.0 percent of original size [2021-11-20 22:51:57,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 150 treesize of output 168 [2021-11-20 22:51:57,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:57,303 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-20 22:51:57,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 18 [2021-11-20 22:51:57,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:57,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 19 [2021-11-20 22:51:57,547 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:57,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 19 [2021-11-20 22:51:57,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-20 22:51:57,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:57,850 INFO L354 Elim1Store]: treesize reduction 116, result has 28.8 percent of original size [2021-11-20 22:51:57,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 124 [2021-11-20 22:51:57,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 3 [2021-11-20 22:51:57,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:57,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 37 treesize of output 7 [2021-11-20 22:51:58,208 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:58,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 19 [2021-11-20 22:51:59,230 INFO L354 Elim1Store]: treesize reduction 162, result has 27.4 percent of original size [2021-11-20 22:51:59,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 164 [2021-11-20 22:51:59,363 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:59,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:51:59,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 175 treesize of output 124 [2021-11-20 22:51:59,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:59,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:59,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:59,983 INFO L354 Elim1Store]: treesize reduction 786, result has 20.0 percent of original size [2021-11-20 22:51:59,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 372 treesize of output 628 [2021-11-20 22:52:00,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:00,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:00,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:00,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 203 treesize of output 107 [2021-11-20 22:52:00,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:00,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:00,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:00,375 INFO L354 Elim1Store]: treesize reduction 132, result has 7.0 percent of original size [2021-11-20 22:52:00,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 252 treesize of output 143 [2021-11-20 22:52:00,451 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:52:00,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:00,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:00,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:00,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:00,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 105 [2021-11-20 22:52:00,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:00,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:00,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:52:00,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 80 [2021-11-20 22:52:01,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:01,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:01,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:01,026 INFO L354 Elim1Store]: treesize reduction 132, result has 7.0 percent of original size [2021-11-20 22:52:01,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 267 treesize of output 159 [2021-11-20 22:52:01,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:01,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:01,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:01,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:52:01,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 211 treesize of output 258 [2021-11-20 22:52:01,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:01,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 96 treesize of output 51 [2021-11-20 22:52:01,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:01,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:01,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:01,347 INFO L354 Elim1Store]: treesize reduction 132, result has 7.0 percent of original size [2021-11-20 22:52:01,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 207 treesize of output 101 [2021-11-20 22:52:03,090 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:52:03,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-20 22:52:03,233 INFO L354 Elim1Store]: treesize reduction 116, result has 28.8 percent of original size [2021-11-20 22:52:03,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 124 [2021-11-20 22:52:03,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:52:03,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 90 treesize of output 90 [2021-11-20 22:52:03,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 19 [2021-11-20 22:52:03,525 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:52:03,591 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 17 for LOIs [2021-11-20 22:52:03,612 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 21 for LOIs [2021-11-20 22:52:03,674 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:52:05,262 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:52:05,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:52:05,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-20 22:52:05,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902987544] [2021-11-20 22:52:05,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 22:52:05,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 22:52:05,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:05,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 22:52:05,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-11-20 22:52:05,264 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 22:52:05,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:05,401 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2021-11-20 22:52:05,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 22:52:05,401 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 34 [2021-11-20 22:52:05,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:05,402 INFO L225 Difference]: With dead ends: 66 [2021-11-20 22:52:05,402 INFO L226 Difference]: Without dead ends: 45 [2021-11-20 22:52:05,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-11-20 22:52:05,404 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:05,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 42 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:52:05,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-20 22:52:05,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2021-11-20 22:52:05,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 22:52:05,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-11-20 22:52:05,411 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 34 [2021-11-20 22:52:05,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:05,412 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-11-20 22:52:05,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 22:52:05,412 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-11-20 22:52:05,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 22:52:05,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:05,414 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:05,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:05,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 22:52:05,622 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:05,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:05,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1831697292, now seen corresponding path program 3 times [2021-11-20 22:52:05,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:05,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83407174] [2021-11-20 22:52:05,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:05,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:05,630 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:52:05,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49445099] [2021-11-20 22:52:05,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 22:52:05,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:52:05,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:52:05,635 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:52:05,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9b87b66-72f7-4843-a5b8-29dafb4579d6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 22:52:07,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 22:52:07,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:52:07,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-20 22:52:07,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:07,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-20 22:52:07,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-20 22:52:07,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 91 [2021-11-20 22:52:07,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 36 treesize of output 7 [2021-11-20 22:52:07,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,486 INFO L354 Elim1Store]: treesize reduction 70, result has 19.5 percent of original size [2021-11-20 22:52:07,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 90 [2021-11-20 22:52:07,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 51 treesize of output 23 [2021-11-20 22:52:07,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 51 treesize of output 23 [2021-11-20 22:52:07,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,722 INFO L354 Elim1Store]: treesize reduction 112, result has 13.2 percent of original size [2021-11-20 22:52:07,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 133 treesize of output 181 [2021-11-20 22:52:07,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,793 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-20 22:52:07,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 52 [2021-11-20 22:52:07,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:07,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 83 [2021-11-20 22:52:09,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:09,726 INFO L354 Elim1Store]: treesize reduction 215, result has 42.7 percent of original size [2021-11-20 22:52:09,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 107 treesize of output 260 [2021-11-20 22:52:10,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:10,727 INFO L354 Elim1Store]: treesize reduction 18, result has 70.5 percent of original size [2021-11-20 22:52:10,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 377 treesize of output 308 [2021-11-20 22:52:18,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:18,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:18,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:20,299 INFO L354 Elim1Store]: treesize reduction 1462, result has 18.6 percent of original size [2021-11-20 22:52:20,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 30 case distinctions, treesize of input 400 treesize of output 575 [2021-11-20 22:52:20,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:20,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:20,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:20,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:20,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:20,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:20,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:20,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:20,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:20,480 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-20 22:52:20,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 47 [2021-11-20 22:52:20,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:20,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:20,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:20,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:20,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:20,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:20,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:20,921 INFO L354 Elim1Store]: treesize reduction 18, result has 76.0 percent of original size [2021-11-20 22:52:20,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 456 treesize of output 373 [2021-11-20 22:52:21,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:21,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:21,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:21,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:21,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:21,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:21,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:21,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:21,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:21,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:21,624 INFO L354 Elim1Store]: treesize reduction 25, result has 76.9 percent of original size [2021-11-20 22:52:21,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 401 treesize of output 276 [2021-11-20 22:52:43,813 INFO L354 Elim1Store]: treesize reduction 159, result has 42.8 percent of original size [2021-11-20 22:52:43,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 240 treesize of output 207 [2021-11-20 22:52:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:44,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:18,418 WARN L227 SmtUtils]: Spent 5.47s on a formula simplification that was a NOOP. DAG size: 93 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 22:57:36,038 WARN L227 SmtUtils]: Spent 2.36m on a formula simplification. DAG size of input: 143 DAG size of output: 143 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 22:58:17,626 WARN L227 SmtUtils]: Spent 15.67s on a formula simplification that was a NOOP. DAG size: 158 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 22:58:33,085 WARN L227 SmtUtils]: Spent 6.85s on a formula simplification that was a NOOP. DAG size: 105 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:04:06,977 WARN L227 SmtUtils]: Spent 1.07m on a formula simplification that was a NOOP. DAG size: 166 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:04:21,550 WARN L227 SmtUtils]: Spent 8.49s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:04:35,665 WARN L227 SmtUtils]: Spent 6.70s on a formula simplification that was a NOOP. DAG size: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)