./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array23_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_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/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_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array23_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/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_363280df-2c8e-4c50-b432-ec5147c22e18/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 e6bb9e1c9705c406859f1248122e92b7c01da6449c586b213f4fa087ea45e218 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:32:22,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:32:22,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:32:22,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:32:22,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:32:22,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:32:22,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:32:22,411 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:32:22,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:32:22,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:32:22,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:32:22,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:32:22,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:32:22,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:32:22,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:32:22,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:32:22,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:32:22,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:32:22,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:32:22,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:32:22,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:32:22,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:32:22,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:32:22,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:32:22,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:32:22,478 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:32:22,479 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:32:22,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:32:22,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:32:22,484 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:32:22,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:32:22,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:32:22,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:32:22,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:32:22,493 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:32:22,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:32:22,494 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:32:22,495 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:32:22,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:32:22,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:32:22,497 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:32:22,498 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:32:22,557 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:32:22,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:32:22,558 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:32:22,559 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:32:22,560 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:32:22,560 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:32:22,561 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:32:22,561 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:32:22,561 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:32:22,562 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:32:22,563 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:32:22,563 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:32:22,564 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:32:22,564 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:32:22,564 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:32:22,564 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:32:22,565 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:32:22,565 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:32:22,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:32:22,566 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:32:22,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:32:22,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:32:22,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:32:22,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:32:22,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:32:22,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:32:22,570 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:32:22,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:32:22,570 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:32:22,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:32:22,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:32:22,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:32:22,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:32:22,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:32:22,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:32:22,573 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:32:22,573 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:32:22,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:32:22,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:32:22,574 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:32:22,574 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:32:22,574 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_363280df-2c8e-4c50-b432-ec5147c22e18/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6bb9e1c9705c406859f1248122e92b7c01da6449c586b213f4fa087ea45e218 [2021-11-21 01:32:22,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:32:22,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:32:22,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:32:22,885 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:32:22,886 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:32:22,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-patterns/array23_pattern.c [2021-11-21 01:32:22,967 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/data/f9eb4119f/1c41767658c24b299ef8093883f53eed/FLAGa7b50712b [2021-11-21 01:32:23,487 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:32:23,492 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/sv-benchmarks/c/array-patterns/array23_pattern.c [2021-11-21 01:32:23,504 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/data/f9eb4119f/1c41767658c24b299ef8093883f53eed/FLAGa7b50712b [2021-11-21 01:32:23,813 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/data/f9eb4119f/1c41767658c24b299ef8093883f53eed [2021-11-21 01:32:23,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:32:23,818 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:32:23,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:32:23,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:32:23,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:32:23,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:32:23" (1/1) ... [2021-11-21 01:32:23,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@193cdfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:23, skipping insertion in model container [2021-11-21 01:32:23,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:32:23" (1/1) ... [2021-11-21 01:32:23,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:32:23,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:32:24,062 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_363280df-2c8e-4c50-b432-ec5147c22e18/sv-benchmarks/c/array-patterns/array23_pattern.c[1347,1360] [2021-11-21 01:32:24,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:32:24,095 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:32:24,109 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_363280df-2c8e-4c50-b432-ec5147c22e18/sv-benchmarks/c/array-patterns/array23_pattern.c[1347,1360] [2021-11-21 01:32:24,124 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:32:24,140 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:32:24,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:24 WrapperNode [2021-11-21 01:32:24,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:32:24,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:32:24,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:32:24,142 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:32:24,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:24" (1/1) ... [2021-11-21 01:32:24,175 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:24" (1/1) ... [2021-11-21 01:32:24,202 INFO L137 Inliner]: procedures = 17, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2021-11-21 01:32:24,203 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:32:24,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:32:24,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:32:24,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:32:24,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:24" (1/1) ... [2021-11-21 01:32:24,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:24" (1/1) ... [2021-11-21 01:32:24,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:24" (1/1) ... [2021-11-21 01:32:24,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:24" (1/1) ... [2021-11-21 01:32:24,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:24" (1/1) ... [2021-11-21 01:32:24,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:24" (1/1) ... [2021-11-21 01:32:24,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:24" (1/1) ... [2021-11-21 01:32:24,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:32:24,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:32:24,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:32:24,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:32:24,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:24" (1/1) ... [2021-11-21 01:32:24,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:32:24,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:24,274 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:32:24,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:32:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2021-11-21 01:32:24,320 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2021-11-21 01:32:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:32:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:32:24,320 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:32:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:32:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:32:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:32:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:32:24,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:32:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:32:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:32:24,393 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:32:24,394 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:32:24,612 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:32:24,708 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:32:24,708 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-21 01:32:24,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:32:24 BoogieIcfgContainer [2021-11-21 01:32:24,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:32:24,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:32:24,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:32:24,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:32:24,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:32:23" (1/3) ... [2021-11-21 01:32:24,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191865b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:32:24, skipping insertion in model container [2021-11-21 01:32:24,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:24" (2/3) ... [2021-11-21 01:32:24,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191865b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:32:24, skipping insertion in model container [2021-11-21 01:32:24,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:32:24" (3/3) ... [2021-11-21 01:32:24,732 INFO L111 eAbstractionObserver]: Analyzing ICFG array23_pattern.c [2021-11-21 01:32:24,741 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:32:24,741 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:32:24,814 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:32:24,823 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 [2021-11-21 01:32:24,830 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:32:24,866 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) [2021-11-21 01:32:24,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:32:24,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:24,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:24,874 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:24,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:24,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1938318667, now seen corresponding path program 1 times [2021-11-21 01:32:24,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:24,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190601345] [2021-11-21 01:32:24,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:24,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:25,005 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:32:25,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682471758] [2021-11-21 01:32:25,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:25,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:25,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:25,019 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:25,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:32:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:25,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 01:32:25,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:32:25,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:32:25,225 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:25,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190601345] [2021-11-21 01:32:25,227 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:32:25,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682471758] [2021-11-21 01:32:25,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682471758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:25,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:25,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:32:25,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26351393] [2021-11-21 01:32:25,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:25,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:32:25,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:25,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:32:25,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:32:25,278 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) [2021-11-21 01:32:25,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:25,341 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2021-11-21 01:32:25,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:32:25,347 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 [2021-11-21 01:32:25,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:25,366 INFO L225 Difference]: With dead ends: 33 [2021-11-21 01:32:25,366 INFO L226 Difference]: Without dead ends: 23 [2021-11-21 01:32:25,370 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 [2021-11-21 01:32:25,380 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:25,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:32:25,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-21 01:32:25,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-21 01:32:25,419 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) [2021-11-21 01:32:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-11-21 01:32:25,421 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 11 [2021-11-21 01:32:25,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:25,423 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-11-21 01:32:25,423 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) [2021-11-21 01:32:25,423 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-11-21 01:32:25,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 01:32:25,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:25,429 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] [2021-11-21 01:32:25,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:25,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 01:32:25,639 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:25,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:25,640 INFO L85 PathProgramCache]: Analyzing trace with hash -651899950, now seen corresponding path program 1 times [2021-11-21 01:32:25,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:25,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628525242] [2021-11-21 01:32:25,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:25,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:25,661 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:32:25,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157977427] [2021-11-21 01:32:25,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:25,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:25,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:25,663 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:25,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:32:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:25,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:32:25,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 01:32:25,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:32:25,941 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:25,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628525242] [2021-11-21 01:32:25,942 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:32:25,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157977427] [2021-11-21 01:32:25,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157977427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:25,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:25,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:32:25,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595361768] [2021-11-21 01:32:25,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:25,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:32:25,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:25,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:32:25,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:32:25,957 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) [2021-11-21 01:32:26,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:26,022 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2021-11-21 01:32:26,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:32:26,022 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 [2021-11-21 01:32:26,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:26,024 INFO L225 Difference]: With dead ends: 28 [2021-11-21 01:32:26,024 INFO L226 Difference]: Without dead ends: 25 [2021-11-21 01:32:26,024 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 [2021-11-21 01:32:26,026 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 [2021-11-21 01:32:26,027 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] [2021-11-21 01:32:26,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-21 01:32:26,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-21 01:32:26,034 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) [2021-11-21 01:32:26,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2021-11-21 01:32:26,036 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 26 [2021-11-21 01:32:26,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:26,036 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2021-11-21 01:32:26,036 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) [2021-11-21 01:32:26,037 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2021-11-21 01:32:26,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 01:32:26,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:26,038 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] [2021-11-21 01:32:26,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:26,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:26,263 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:26,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:26,264 INFO L85 PathProgramCache]: Analyzing trace with hash -741748724, now seen corresponding path program 1 times [2021-11-21 01:32:26,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:26,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140395943] [2021-11-21 01:32:26,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:26,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:26,277 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:32:26,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859679311] [2021-11-21 01:32:26,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:26,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:26,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:26,279 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:26,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:32:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:26,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:32:26,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 01:32:26,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:32:26,483 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:26,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140395943] [2021-11-21 01:32:26,484 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:32:26,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859679311] [2021-11-21 01:32:26,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859679311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:26,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:26,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:32:26,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048762813] [2021-11-21 01:32:26,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:26,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:32:26,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:26,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:32:26,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:32:26,488 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) [2021-11-21 01:32:26,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:26,620 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2021-11-21 01:32:26,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:32:26,621 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 [2021-11-21 01:32:26,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:26,622 INFO L225 Difference]: With dead ends: 51 [2021-11-21 01:32:26,622 INFO L226 Difference]: Without dead ends: 30 [2021-11-21 01:32:26,623 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 [2021-11-21 01:32:26,625 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 [2021-11-21 01:32:26,626 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] [2021-11-21 01:32:26,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-21 01:32:26,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-11-21 01:32:26,633 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) [2021-11-21 01:32:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2021-11-21 01:32:26,634 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 29 [2021-11-21 01:32:26,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:26,634 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2021-11-21 01:32:26,635 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) [2021-11-21 01:32:26,635 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2021-11-21 01:32:26,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-21 01:32:26,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:26,637 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] [2021-11-21 01:32:26,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:26,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:26,857 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:26,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:26,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1070521775, now seen corresponding path program 1 times [2021-11-21 01:32:26,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:26,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658455221] [2021-11-21 01:32:26,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:26,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:26,873 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:32:26,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381195811] [2021-11-21 01:32:26,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:26,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:26,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:26,875 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:26,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:32:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:26,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:32:26,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:32:27,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:32:27,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:27,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658455221] [2021-11-21 01:32:27,120 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:32:27,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381195811] [2021-11-21 01:32:27,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381195811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:27,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:27,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:32:27,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299794670] [2021-11-21 01:32:27,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:27,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:32:27,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:27,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:32:27,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:32:27,130 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) [2021-11-21 01:32:27,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:27,197 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2021-11-21 01:32:27,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:32:27,198 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 [2021-11-21 01:32:27,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:27,203 INFO L225 Difference]: With dead ends: 50 [2021-11-21 01:32:27,203 INFO L226 Difference]: Without dead ends: 28 [2021-11-21 01:32:27,206 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 [2021-11-21 01:32:27,207 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 [2021-11-21 01:32:27,210 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] [2021-11-21 01:32:27,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-21 01:32:27,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-21 01:32:27,227 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) [2021-11-21 01:32:27,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-11-21 01:32:27,228 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 31 [2021-11-21 01:32:27,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:27,230 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-11-21 01:32:27,230 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) [2021-11-21 01:32:27,231 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-11-21 01:32:27,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 01:32:27,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:27,232 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] [2021-11-21 01:32:27,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:27,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:27,459 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:27,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:27,460 INFO L85 PathProgramCache]: Analyzing trace with hash 272504613, now seen corresponding path program 1 times [2021-11-21 01:32:27,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:27,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388970650] [2021-11-21 01:32:27,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:27,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:27,472 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:32:27,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160646618] [2021-11-21 01:32:27,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:27,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:27,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:27,474 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:27,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:32:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:27,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:32:27,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:32:27,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:32:27,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 01:32:27,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:27,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388970650] [2021-11-21 01:32:27,788 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:32:27,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160646618] [2021-11-21 01:32:27,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160646618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:32:27,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2064648387] [2021-11-21 01:32:27,808 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:32:27,809 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:32:27,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:32:27,819 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:32:27,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:32:28,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:28,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:28,271 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:32:28,272 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 [2021-11-21 01:32:28,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:28,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:28,334 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 [2021-11-21 01:32:28,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:28,425 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 [2021-11-21 01:32:28,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:28,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:28,641 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 [2021-11-21 01:32:28,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:28,793 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 [2021-11-21 01:32:29,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:29,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:29,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:29,162 INFO L354 Elim1Store]: treesize reduction 224, result has 23.5 percent of original size [2021-11-21 01:32:29,163 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 [2021-11-21 01:32:29,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:29,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:29,842 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 [2021-11-21 01:32:30,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:30,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:30,144 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 [2021-11-21 01:32:31,433 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:31,441 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 [2021-11-21 01:32:31,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:31,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,019 INFO L354 Elim1Store]: treesize reduction 100, result has 13.0 percent of original size [2021-11-21 01:32:32,020 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 [2021-11-21 01:32:32,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:32,149 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-21 01:32:32,149 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 [2021-11-21 01:32:32,654 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:32,665 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 [2021-11-21 01:32:32,765 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:32,778 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 [2021-11-21 01:32:32,984 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:32,992 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 [2021-11-21 01:32:33,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:33,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:33,067 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 [2021-11-21 01:32:33,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:33,137 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 [2021-11-21 01:32:33,299 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:33,309 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 [2021-11-21 01:32:34,720 INFO L354 Elim1Store]: treesize reduction 162, result has 27.4 percent of original size [2021-11-21 01:32:34,720 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 [2021-11-21 01:32:34,920 INFO L354 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2021-11-21 01:32:34,921 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 [2021-11-21 01:32:35,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:35,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:35,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:35,532 INFO L354 Elim1Store]: treesize reduction 736, result has 24.5 percent of original size [2021-11-21 01:32:35,533 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 363 treesize of output 667 [2021-11-21 01:32:36,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:36,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:36,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:36,049 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 188 treesize of output 116 [2021-11-21 01:32:36,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:36,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:36,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:36,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:36,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:36,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:32:36,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 239 treesize of output 191 [2021-11-21 01:32:36,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:36,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:36,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:36,689 INFO L354 Elim1Store]: treesize reduction 118, result has 16.3 percent of original size [2021-11-21 01:32:36,689 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 879 treesize of output 694 [2021-11-21 01:32:36,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:36,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:36,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:36,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:32:36,974 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 855 treesize of output 593 [2021-11-21 01:32:37,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:37,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:37,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:37,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:37,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:37,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:32:37,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 379 treesize of output 209 [2021-11-21 01:32:39,540 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 [2021-11-21 01:32:39,552 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:39,652 INFO L354 Elim1Store]: treesize reduction 116, result has 28.8 percent of original size [2021-11-21 01:32:39,652 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 [2021-11-21 01:32:39,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:39,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:32:39,835 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 125 treesize of output 113 [2021-11-21 01:32:40,030 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 [2021-11-21 01:32:40,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:40,146 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 17 for LOIs [2021-11-21 01:32:40,167 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 21 for LOIs [2021-11-21 01:32:40,210 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:32:41,786 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:32:41,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:32:41,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-21 01:32:41,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620937503] [2021-11-21 01:32:41,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:32:41,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:32:41,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:41,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:32:41,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-11-21 01:32:41,789 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) [2021-11-21 01:32:41,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:41,901 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2021-11-21 01:32:41,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:32:41,902 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 [2021-11-21 01:32:41,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:41,902 INFO L225 Difference]: With dead ends: 54 [2021-11-21 01:32:41,903 INFO L226 Difference]: Without dead ends: 31 [2021-11-21 01:32:41,904 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 [2021-11-21 01:32:41,905 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 [2021-11-21 01:32:41,905 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] [2021-11-21 01:32:41,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-21 01:32:41,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-21 01:32:41,911 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) [2021-11-21 01:32:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-11-21 01:32:41,912 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 32 [2021-11-21 01:32:41,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:41,912 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-11-21 01:32:41,912 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) [2021-11-21 01:32:41,913 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-11-21 01:32:41,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 01:32:41,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:41,914 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] [2021-11-21 01:32:41,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:42,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:42,127 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:42,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:42,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1994024419, now seen corresponding path program 2 times [2021-11-21 01:32:42,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:42,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048659972] [2021-11-21 01:32:42,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:42,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:42,136 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:32:42,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702301211] [2021-11-21 01:32:42,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:32:42,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:42,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:42,141 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:42,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:32:42,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:32:42,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:32:42,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:32:42,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:32:42,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:32:42,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 01:32:42,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:42,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048659972] [2021-11-21 01:32:42,442 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:32:42,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702301211] [2021-11-21 01:32:42,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702301211] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:32:42,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [804797524] [2021-11-21 01:32:42,448 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:32:42,448 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:32:42,449 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:32:42,449 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:32:42,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:32:42,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:42,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:42,742 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-21 01:32:42,743 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 [2021-11-21 01:32:42,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-11-21 01:32:42,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:42,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:42,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:32:42,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-11-21 01:32:42,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:42,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:42,998 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:32:42,998 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 [2021-11-21 01:32:43,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:43,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:43,348 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 [2021-11-21 01:32:43,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:43,397 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 [2021-11-21 01:32:43,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:43,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:43,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:43,701 INFO L354 Elim1Store]: treesize reduction 220, result has 20.6 percent of original size [2021-11-21 01:32:43,701 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 [2021-11-21 01:32:44,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:44,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:44,105 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-11-21 01:32:44,105 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 [2021-11-21 01:32:45,009 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:45,027 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 [2021-11-21 01:32:45,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:45,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:45,483 INFO L354 Elim1Store]: treesize reduction 100, result has 13.0 percent of original size [2021-11-21 01:32:45,483 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 [2021-11-21 01:32:45,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:45,548 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-21 01:32:45,548 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 [2021-11-21 01:32:45,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:45,793 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 [2021-11-21 01:32:45,825 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:45,831 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 [2021-11-21 01:32:45,997 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 [2021-11-21 01:32:46,008 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:46,120 INFO L354 Elim1Store]: treesize reduction 116, result has 28.8 percent of original size [2021-11-21 01:32:46,120 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 [2021-11-21 01:32:46,200 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 [2021-11-21 01:32:46,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:46,237 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 [2021-11-21 01:32:46,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:46,429 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 [2021-11-21 01:32:47,535 INFO L354 Elim1Store]: treesize reduction 162, result has 27.4 percent of original size [2021-11-21 01:32:47,535 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 [2021-11-21 01:32:47,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:47,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:32:47,687 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 [2021-11-21 01:32:48,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:48,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:48,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:48,258 INFO L354 Elim1Store]: treesize reduction 736, result has 24.5 percent of original size [2021-11-21 01:32:48,258 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 363 treesize of output 667 [2021-11-21 01:32:48,632 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:48,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:48,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:48,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:48,810 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 152 treesize of output 82 [2021-11-21 01:32:48,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:48,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:48,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:48,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:48,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:48,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:32:48,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 207 treesize of output 157 [2021-11-21 01:32:49,041 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:49,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:49,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:49,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:49,167 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 156 treesize of output 84 [2021-11-21 01:32:49,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:49,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:49,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:49,647 INFO L354 Elim1Store]: treesize reduction 100, result has 29.1 percent of original size [2021-11-21 01:32:49,647 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 583 treesize of output 505 [2021-11-21 01:32:49,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:49,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:49,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:49,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:32:49,997 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 1320 treesize of output 1040 [2021-11-21 01:32:50,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:50,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:50,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:50,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:50,435 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 546 treesize of output 181 [2021-11-21 01:32:50,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:50,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:50,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:50,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:50,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:50,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:50,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 597 treesize of output 265 [2021-11-21 01:32:52,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:52,410 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 [2021-11-21 01:32:52,520 INFO L354 Elim1Store]: treesize reduction 116, result has 28.8 percent of original size [2021-11-21 01:32:52,520 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 [2021-11-21 01:32:52,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:32:52,640 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 [2021-11-21 01:32:52,808 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 [2021-11-21 01:32:52,833 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:52,883 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 17 for LOIs [2021-11-21 01:32:52,899 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 21 for LOIs [2021-11-21 01:32:52,931 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:32:54,388 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:32:54,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:32:54,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-21 01:32:54,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093000259] [2021-11-21 01:32:54,389 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:32:54,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:32:54,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:54,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:32:54,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-11-21 01:32:54,390 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) [2021-11-21 01:32:54,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:54,531 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2021-11-21 01:32:54,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:32:54,532 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 [2021-11-21 01:32:54,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:54,533 INFO L225 Difference]: With dead ends: 66 [2021-11-21 01:32:54,533 INFO L226 Difference]: Without dead ends: 45 [2021-11-21 01:32:54,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-11-21 01:32:54,535 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 [2021-11-21 01:32:54,535 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] [2021-11-21 01:32:54,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-21 01:32:54,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2021-11-21 01:32:54,548 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) [2021-11-21 01:32:54,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-11-21 01:32:54,549 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 34 [2021-11-21 01:32:54,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:54,549 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-11-21 01:32:54,549 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) [2021-11-21 01:32:54,550 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-11-21 01:32:54,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-21 01:32:54,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:54,551 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] [2021-11-21 01:32:54,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-21 01:32:54,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:54,767 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:54,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:54,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1831697292, now seen corresponding path program 3 times [2021-11-21 01:32:54,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:54,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867770076] [2021-11-21 01:32:54,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:54,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:54,774 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:32:54,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652796436] [2021-11-21 01:32:54,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:32:54,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:54,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:54,787 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:54,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363280df-2c8e-4c50-b432-ec5147c22e18/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:32:55,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:32:55,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:32:55,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-21 01:32:55,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:55,983 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 [2021-11-21 01:32:55,992 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 [2021-11-21 01:32:56,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,059 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 [2021-11-21 01:32:56,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,083 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 [2021-11-21 01:32:56,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,259 INFO L354 Elim1Store]: treesize reduction 70, result has 19.5 percent of original size [2021-11-21 01:32:56,259 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 [2021-11-21 01:32:56,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,285 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 [2021-11-21 01:32:56,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,322 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 [2021-11-21 01:32:56,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,479 INFO L354 Elim1Store]: treesize reduction 112, result has 13.2 percent of original size [2021-11-21 01:32:56,480 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 [2021-11-21 01:32:56,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,532 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-21 01:32:56,532 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 [2021-11-21 01:32:56,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:56,598 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 [2021-11-21 01:32:58,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:58,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:58,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:58,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:58,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:58,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:58,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:58,294 INFO L354 Elim1Store]: treesize reduction 215, result has 42.7 percent of original size [2021-11-21 01:32:58,294 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 [2021-11-21 01:32:59,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:59,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:59,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:59,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:59,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:59,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:59,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:59,290 INFO L354 Elim1Store]: treesize reduction 18, result has 70.5 percent of original size [2021-11-21 01:32:59,290 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 [2021-11-21 01:33:06,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:06,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:06,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:08,198 INFO L354 Elim1Store]: treesize reduction 1468, result has 19.1 percent of original size [2021-11-21 01:33:08,200 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 392 treesize of output 581 [2021-11-21 01:33:08,537 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:08,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:10,670 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:10,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:11,096 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:11,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:11,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:11,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:11,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:11,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:11,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:11,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:11,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:11,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:11,897 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-21 01:33:11,898 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 690 treesize of output 593 [2021-11-21 01:33:18,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:18,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:18,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:18,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:18,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:18,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:18,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:18,570 INFO L354 Elim1Store]: treesize reduction 4, result has 94.7 percent of original size [2021-11-21 01:33:18,570 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 705 treesize of output 594 [2021-11-21 01:33:19,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:19,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:19,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:19,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:19,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:19,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:19,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:19,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:19,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:19,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:19,675 INFO L354 Elim1Store]: treesize reduction 25, result has 76.9 percent of original size [2021-11-21 01:33:19,676 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 15 case distinctions, treesize of input 571 treesize of output 381 [2021-11-21 01:33:48,640 INFO L354 Elim1Store]: treesize reduction 159, result has 42.8 percent of original size [2021-11-21 01:33:48,641 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 318 treesize of output 222 [2021-11-21 01:33:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:49,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:44,292 WARN L227 SmtUtils]: Spent 1.36m on a formula simplification that was a NOOP. DAG size: 142 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:36:59,056 WARN L227 SmtUtils]: Spent 33.34s 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) [2021-11-21 01:37:33,336 WARN L227 SmtUtils]: Spent 22.55s on a formula simplification that was a NOOP. DAG size: 113 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)