./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy9_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy9_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW --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 aab03c22d13215fab0d6755eff6eea090232335ae63c67c9d83313131cbb4c89 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:33:13,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:33:13,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:33:13,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:33:13,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:33:13,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:33:13,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:33:13,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:33:13,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:33:13,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:33:13,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:33:13,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:33:13,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:33:13,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:33:13,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:33:13,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:33:13,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:33:13,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:33:13,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:33:13,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:33:13,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:33:13,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:33:13,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:33:13,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:33:13,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:33:13,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:33:13,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:33:13,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:33:13,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:33:13,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:33:13,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:33:13,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:33:13,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:33:13,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:33:13,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:33:13,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:33:13,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:33:13,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:33:13,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:33:13,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:33:13,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:33:13,400 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:33:13,442 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:33:13,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:33:13,448 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:33:13,448 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:33:13,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:33:13,449 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:33:13,450 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:33:13,450 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:33:13,450 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:33:13,450 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:33:13,451 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:33:13,452 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:33:13,452 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:33:13,452 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:33:13,452 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:33:13,453 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:33:13,453 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:33:13,453 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:33:13,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:33:13,454 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:33:13,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:33:13,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:33:13,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:33:13,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:33:13,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:33:13,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:33:13,456 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:33:13,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:33:13,456 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:33:13,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:33:13,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:33:13,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:33:13,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:33:13,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:33:13,458 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:33:13,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:33:13,459 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:33:13,459 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:33:13,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:33:13,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:33:13,460 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:33:13,460 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aab03c22d13215fab0d6755eff6eea090232335ae63c67c9d83313131cbb4c89 [2022-11-23 14:33:13,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:33:13,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:33:13,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:33:13,782 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:33:13,784 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:33:13,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-examples/standard_copy9_ground-2.i [2022-11-23 14:33:17,040 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:33:17,315 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:33:17,316 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/sv-benchmarks/c/array-examples/standard_copy9_ground-2.i [2022-11-23 14:33:17,323 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/data/8d10cd9ce/e48a929c4b464c68b3a7ce8b6cc2847e/FLAGc80e1d5f1 [2022-11-23 14:33:17,340 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/data/8d10cd9ce/e48a929c4b464c68b3a7ce8b6cc2847e [2022-11-23 14:33:17,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:33:17,345 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:33:17,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:33:17,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:33:17,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:33:17,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:33:17" (1/1) ... [2022-11-23 14:33:17,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a6ba352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:17, skipping insertion in model container [2022-11-23 14:33:17,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:33:17" (1/1) ... [2022-11-23 14:33:17,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:33:17,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:33:17,560 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/sv-benchmarks/c/array-examples/standard_copy9_ground-2.i[816,829] [2022-11-23 14:33:17,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:33:17,598 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:33:17,612 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/sv-benchmarks/c/array-examples/standard_copy9_ground-2.i[816,829] [2022-11-23 14:33:17,630 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:33:17,646 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:33:17,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:17 WrapperNode [2022-11-23 14:33:17,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:33:17,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:33:17,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:33:17,648 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:33:17,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:17" (1/1) ... [2022-11-23 14:33:17,662 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:17" (1/1) ... [2022-11-23 14:33:17,690 INFO L138 Inliner]: procedures = 16, calls = 58, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 192 [2022-11-23 14:33:17,691 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:33:17,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:33:17,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:33:17,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:33:17,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:17" (1/1) ... [2022-11-23 14:33:17,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:17" (1/1) ... [2022-11-23 14:33:17,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:17" (1/1) ... [2022-11-23 14:33:17,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:17" (1/1) ... [2022-11-23 14:33:17,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:17" (1/1) ... [2022-11-23 14:33:17,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:17" (1/1) ... [2022-11-23 14:33:17,732 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:17" (1/1) ... [2022-11-23 14:33:17,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:17" (1/1) ... [2022-11-23 14:33:17,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:33:17,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:33:17,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:33:17,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:33:17,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:17" (1/1) ... [2022-11-23 14:33:17,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:33:17,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:17,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:33:17,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:33:17,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:33:17,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:33:17,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:33:17,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:33:17,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:33:17,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:33:17,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:33:17,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:33:17,934 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:33:17,937 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:33:18,236 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:33:18,331 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:33:18,331 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-23 14:33:18,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:33:18 BoogieIcfgContainer [2022-11-23 14:33:18,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:33:18,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:33:18,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:33:18,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:33:18,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:33:17" (1/3) ... [2022-11-23 14:33:18,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@708cc7bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:33:18, skipping insertion in model container [2022-11-23 14:33:18,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:17" (2/3) ... [2022-11-23 14:33:18,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@708cc7bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:33:18, skipping insertion in model container [2022-11-23 14:33:18,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:33:18" (3/3) ... [2022-11-23 14:33:18,361 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-2.i [2022-11-23 14:33:18,407 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:33:18,407 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:33:18,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:33:18,533 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2bce7b21, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:33:18,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:33:18,546 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:18,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 14:33:18,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:18,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:33:18,555 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:33:18,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:18,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1813374179, now seen corresponding path program 1 times [2022-11-23 14:33:18,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:18,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323600479] [2022-11-23 14:33:18,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:18,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:33:19,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:19,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323600479] [2022-11-23 14:33:19,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323600479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:33:19,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:33:19,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:33:19,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235282636] [2022-11-23 14:33:19,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:33:19,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:33:19,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:19,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:33:19,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:33:19,227 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:19,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:19,333 INFO L93 Difference]: Finished difference Result 33 states and 55 transitions. [2022-11-23 14:33:19,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:33:19,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 14:33:19,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:19,346 INFO L225 Difference]: With dead ends: 33 [2022-11-23 14:33:19,346 INFO L226 Difference]: Without dead ends: 17 [2022-11-23 14:33:19,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:33:19,354 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:19,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:33:19,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-23 14:33:19,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-23 14:33:19,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:19,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 27 transitions. [2022-11-23 14:33:19,395 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 27 transitions. Word has length 14 [2022-11-23 14:33:19,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:19,396 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 27 transitions. [2022-11-23 14:33:19,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:19,396 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 27 transitions. [2022-11-23 14:33:19,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 14:33:19,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:19,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:33:19,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:33:19,398 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:33:19,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:19,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1669124400, now seen corresponding path program 1 times [2022-11-23 14:33:19,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:19,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226340678] [2022-11-23 14:33:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:19,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:33:19,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:19,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226340678] [2022-11-23 14:33:19,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226340678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:33:19,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994334538] [2022-11-23 14:33:19,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:19,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:19,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:19,574 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:19,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:33:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:19,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:33:19,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:33:19,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:33:19,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994334538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:33:19,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:33:19,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-23 14:33:19,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671031827] [2022-11-23 14:33:19,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:33:19,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:33:19,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:19,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:33:19,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:33:19,819 INFO L87 Difference]: Start difference. First operand 17 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:19,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:19,947 INFO L93 Difference]: Finished difference Result 39 states and 66 transitions. [2022-11-23 14:33:19,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:33:19,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-23 14:33:19,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:19,952 INFO L225 Difference]: With dead ends: 39 [2022-11-23 14:33:19,952 INFO L226 Difference]: Without dead ends: 26 [2022-11-23 14:33:19,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:33:19,960 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:19,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:33:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-23 14:33:19,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-23 14:33:19,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-11-23 14:33:19,976 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 15 [2022-11-23 14:33:19,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:19,977 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-11-23 14:33:19,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:19,977 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-11-23 14:33:19,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 14:33:19,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:19,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:33:19,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 14:33:20,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:20,186 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:33:20,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:20,186 INFO L85 PathProgramCache]: Analyzing trace with hash 751608974, now seen corresponding path program 1 times [2022-11-23 14:33:20,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:20,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150711880] [2022-11-23 14:33:20,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:20,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:33:20,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:20,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150711880] [2022-11-23 14:33:20,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150711880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:33:20,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59265177] [2022-11-23 14:33:20,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:20,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:20,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:20,333 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:20,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:33:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:20,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:33:20,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:33:20,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:33:20,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59265177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:33:20,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [633139646] [2022-11-23 14:33:20,620 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:33:20,621 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:33:20,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:33:20,632 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:33:20,633 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:33:20,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:20,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:20,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:20,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:20,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:20,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:20,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:20,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:20,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:20,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:21,852 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-23 14:33:21,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-23 14:33:22,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:22,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:22,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:22,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:22,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:22,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:22,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:22,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:22,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:22,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:23,337 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-23 14:33:23,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-23 14:33:23,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:23,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:33:24,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:24,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:24,734 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:33:24,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 978 treesize of output 977 [2022-11-23 14:33:25,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:33:25,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:25,970 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:25,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:26,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:26,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:26,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:26,083 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:26,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:26,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:26,206 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:26,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:26,287 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:33:26,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:33:26,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:26,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:26,443 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:33:26,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:33:26,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:26,600 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:26,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:26,648 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:33:26,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:33:26,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:26,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:26,796 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:33:26,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:33:26,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:26,926 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:26,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:26,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:26,965 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:26,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:27,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:27,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:27,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:27,057 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:27,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:27,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:27,160 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:27,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:27,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:27,207 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:27,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:27,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:27,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:27,287 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:27,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:27,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:27,358 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:27,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:27,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:27,397 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:27,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:27,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:27,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:27,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:27,479 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:27,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:27,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:27,579 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:27,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:27,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:27,650 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:27,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:27,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:27,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:27,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:27,732 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:27,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:27,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:27,833 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:27,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:27,872 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:33:27,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:33:27,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:27,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:28,004 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:33:28,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:33:28,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:28,121 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:28,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:28,160 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:33:28,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:33:28,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:28,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:28,269 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:33:28,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:33:28,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:28,397 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:28,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:28,426 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:33:29,027 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '415#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-23 14:33:29,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:33:29,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:33:29,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 14:33:29,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600356887] [2022-11-23 14:33:29,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:33:29,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:33:29,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:29,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:33:29,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:33:29,029 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:29,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:29,145 INFO L93 Difference]: Finished difference Result 52 states and 74 transitions. [2022-11-23 14:33:29,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:33:29,146 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-23 14:33:29,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:29,146 INFO L225 Difference]: With dead ends: 52 [2022-11-23 14:33:29,147 INFO L226 Difference]: Without dead ends: 29 [2022-11-23 14:33:29,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:33:29,148 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:29,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:33:29,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-23 14:33:29,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-23 14:33:29,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:29,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-11-23 14:33:29,153 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2022-11-23 14:33:29,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:29,153 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-11-23 14:33:29,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:29,153 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-11-23 14:33:29,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-23 14:33:29,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:29,154 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:33:29,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:33:29,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:29,355 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:33:29,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:29,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1445844837, now seen corresponding path program 2 times [2022-11-23 14:33:29,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:29,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346891753] [2022-11-23 14:33:29,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:29,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:33:29,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:29,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346891753] [2022-11-23 14:33:29,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346891753] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:33:29,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909374490] [2022-11-23 14:33:29,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:33:29,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:29,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:29,523 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:29,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:33:29,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 14:33:29,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:33:29,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:33:29,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:33:29,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:33:29,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909374490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:33:29,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1261855511] [2022-11-23 14:33:29,752 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:33:29,753 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:33:29,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:33:29,753 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:33:29,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:33:29,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:29,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:29,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:29,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:29,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:29,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:29,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:29,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:29,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:29,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:30,643 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-23 14:33:30,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-23 14:33:30,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:30,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:30,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:30,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:30,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:30,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:30,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:30,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:30,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:30,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:30,850 INFO L217 Elim1Store]: Index analysis took 107 ms [2022-11-23 14:33:31,964 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-23 14:33:31,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-23 14:33:32,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:32,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:33:32,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:32,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:32,874 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 14:33:32,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 988 treesize of output 976 [2022-11-23 14:33:33,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:33:33,340 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:33:33,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:33:33,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:33,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:33,453 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:33:33,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:33:33,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:33,543 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:33,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:33,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:33,584 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:33,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:33,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:33,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:33,665 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:33,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:33,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:33,735 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:33,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:33,779 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:33:33,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:33:33,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:33,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:33,904 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:33:33,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:33:33,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:34,008 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:34,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:34,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:34,049 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:34,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:34,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:34,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:34,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:34,129 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:34,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:34,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:34,202 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:34,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:34,261 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:33:34,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:33:34,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:34,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:34,382 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:33:34,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 14:33:34,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:34,521 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:34,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:34,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:34,564 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:34,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:34,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:34,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:34,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:34,648 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:34,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:34,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:34,739 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:34,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:34,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:34,801 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:34,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:34,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:34,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:34,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:34,879 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:34,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:34,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:34,953 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:34,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:34,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:34,989 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:34,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:35,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:35,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:35,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:35,055 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:35,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:35,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:35,124 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:35,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:35,162 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:33:35,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:33:35,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:35,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:35,292 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:33:35,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 14:33:35,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:35,445 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:35,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:35,470 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:33:35,868 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '731#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-23 14:33:35,868 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:33:35,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:33:35,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 14:33:35,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951885249] [2022-11-23 14:33:35,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:33:35,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:33:35,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:35,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:33:35,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:33:35,870 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:36,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:36,061 INFO L93 Difference]: Finished difference Result 77 states and 122 transitions. [2022-11-23 14:33:36,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:33:36,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-23 14:33:36,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:36,063 INFO L225 Difference]: With dead ends: 77 [2022-11-23 14:33:36,064 INFO L226 Difference]: Without dead ends: 56 [2022-11-23 14:33:36,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:33:36,066 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:36,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:33:36,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-23 14:33:36,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-23 14:33:36,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-11-23 14:33:36,074 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 27 [2022-11-23 14:33:36,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:36,075 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-11-23 14:33:36,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:36,075 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-11-23 14:33:36,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 14:33:36,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:36,076 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:33:36,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:33:36,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:36,283 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:33:36,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:36,283 INFO L85 PathProgramCache]: Analyzing trace with hash -783944797, now seen corresponding path program 3 times [2022-11-23 14:33:36,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:36,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126084588] [2022-11-23 14:33:36,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:36,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-23 14:33:36,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:36,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126084588] [2022-11-23 14:33:36,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126084588] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:33:36,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431189304] [2022-11-23 14:33:36,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:33:36,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:36,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:36,537 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:36,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:33:36,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:33:36,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:33:36,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:33:36,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-23 14:33:36,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-23 14:33:36,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431189304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:33:36,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [324916356] [2022-11-23 14:33:36,830 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:33:36,831 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:33:36,831 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:33:36,831 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:33:36,831 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:33:36,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:36,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:36,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:36,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:36,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:36,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:36,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:36,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:36,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:36,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:37,585 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-23 14:33:37,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-23 14:33:37,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:37,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:37,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:37,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:37,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:37,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:37,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:37,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:37,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:37,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:38,716 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-23 14:33:38,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-23 14:33:38,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:38,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:33:39,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:39,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:39,322 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:33:39,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 978 treesize of output 977 [2022-11-23 14:33:40,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:33:40,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:40,059 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:40,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:40,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:40,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:40,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:40,133 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:40,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:40,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:40,234 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:40,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:40,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:40,340 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:40,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:40,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:40,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:40,419 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:40,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:40,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:40,499 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:40,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:40,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:40,535 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:40,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:40,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:40,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:40,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:40,604 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:40,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:40,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:40,712 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:40,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:40,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:40,782 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:40,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:40,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:40,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:40,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:40,860 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:40,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:40,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:40,924 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:40,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:40,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:40,960 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:40,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:41,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:41,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:41,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:41,037 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:41,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:41,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:41,109 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:41,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:41,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:41,146 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:41,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:41,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:41,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:41,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:41,219 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:41,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:41,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:41,316 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:41,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:41,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:41,388 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:41,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:41,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:41,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:41,466 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:41,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:41,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:41,545 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:41,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:41,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:41,585 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:41,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:41,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:41,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:41,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:41,655 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:41,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:41,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:41,723 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:41,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:41,762 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:33:41,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:33:41,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:41,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:41,846 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:33:41,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:33:41,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:41,950 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:41,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:41,972 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:33:42,490 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1319#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-23 14:33:42,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:33:42,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:33:42,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 14:33:42,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173187866] [2022-11-23 14:33:42,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:33:42,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:33:42,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:42,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:33:42,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-23 14:33:42,493 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:42,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:42,584 INFO L93 Difference]: Finished difference Result 112 states and 137 transitions. [2022-11-23 14:33:42,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:33:42,585 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-23 14:33:42,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:42,585 INFO L225 Difference]: With dead ends: 112 [2022-11-23 14:33:42,586 INFO L226 Difference]: Without dead ends: 62 [2022-11-23 14:33:42,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-23 14:33:42,587 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:42,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:33:42,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-23 14:33:42,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-23 14:33:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:42,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-11-23 14:33:42,597 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 54 [2022-11-23 14:33:42,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:42,597 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-11-23 14:33:42,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:42,598 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-11-23 14:33:42,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-23 14:33:42,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:42,599 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:33:42,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 14:33:42,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:42,805 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:33:42,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:42,806 INFO L85 PathProgramCache]: Analyzing trace with hash 32937091, now seen corresponding path program 4 times [2022-11-23 14:33:42,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:42,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621595743] [2022-11-23 14:33:42,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:42,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-23 14:33:43,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:43,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621595743] [2022-11-23 14:33:43,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621595743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:33:43,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330663435] [2022-11-23 14:33:43,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:33:43,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:43,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:43,243 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:43,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:33:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:43,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:33:43,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-23 14:33:43,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-23 14:33:43,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330663435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:33:43,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1147349073] [2022-11-23 14:33:43,726 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:33:43,726 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:33:43,726 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:33:43,727 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:33:43,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:33:43,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:43,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:43,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:43,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:43,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:43,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:43,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:43,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:43,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:43,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:44,914 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-23 14:33:44,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-23 14:33:45,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 76 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 67 [2022-11-23 14:33:45,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:33:45,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:45,873 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:33:45,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 978 treesize of output 977 [2022-11-23 14:33:46,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:33:46,681 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:33:46,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:33:46,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:46,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:46,785 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:33:46,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:33:46,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:46,886 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:46,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:46,947 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:33:46,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:33:46,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:46,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:47,062 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:33:47,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:33:47,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:47,175 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:47,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:47,211 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:33:47,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:33:47,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:47,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:47,312 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:33:47,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 14:33:47,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:47,468 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:47,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:47,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:47,505 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:47,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:47,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:47,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:47,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:47,587 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:47,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:47,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:47,653 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:47,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:47,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:47,694 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:47,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:47,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:47,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:47,763 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:47,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:47,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:47,835 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:47,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:47,873 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:33:47,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:33:47,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:47,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:47,968 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:33:47,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:33:48,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:48,087 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:48,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:48,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:48,128 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:48,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:48,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:48,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:48,206 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:48,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:48,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:48,274 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:48,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:48,313 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:33:48,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:33:48,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:48,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:48,440 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:33:48,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 14:33:48,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:48,529 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:48,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:48,571 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:33:48,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:33:48,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:48,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:48,683 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:33:48,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:33:48,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:48,788 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:48,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:48,813 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:33:49,256 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2037#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-23 14:33:49,256 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:33:49,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:33:49,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-23 14:33:49,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807794499] [2022-11-23 14:33:49,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:33:49,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 14:33:49,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:49,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 14:33:49,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:33:49,258 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:49,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:49,380 INFO L93 Difference]: Finished difference Result 124 states and 155 transitions. [2022-11-23 14:33:49,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 14:33:49,381 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-23 14:33:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:49,381 INFO L225 Difference]: With dead ends: 124 [2022-11-23 14:33:49,382 INFO L226 Difference]: Without dead ends: 74 [2022-11-23 14:33:49,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:33:49,383 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:49,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:33:49,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-23 14:33:49,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-23 14:33:49,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 73 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2022-11-23 14:33:49,394 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 60 [2022-11-23 14:33:49,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:49,395 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2022-11-23 14:33:49,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:49,395 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2022-11-23 14:33:49,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-23 14:33:49,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:49,397 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:33:49,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 14:33:49,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:49,599 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:33:49,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:49,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1552506435, now seen corresponding path program 5 times [2022-11-23 14:33:49,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:49,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280727518] [2022-11-23 14:33:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:49,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-23 14:33:50,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:50,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280727518] [2022-11-23 14:33:50,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280727518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:33:50,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336142885] [2022-11-23 14:33:50,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:33:50,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:50,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:50,643 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:50,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:33:51,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:33:51,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:33:51,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:33:51,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:51,573 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-23 14:33:51,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-23 14:33:51,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336142885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:33:51,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1225008086] [2022-11-23 14:33:51,706 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:33:51,707 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:33:51,707 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:33:51,707 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:33:51,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:33:51,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:51,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:51,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:51,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:51,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:51,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:51,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:51,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:51,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:51,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:52,483 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-23 14:33:52,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-23 14:33:52,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:52,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:52,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:52,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:52,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:52,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:52,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:52,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:52,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:52,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:53,592 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-23 14:33:53,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-23 14:33:53,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:53,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:33:54,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:54,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:54,358 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:33:54,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 978 treesize of output 977 [2022-11-23 14:33:55,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:33:55,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:55,144 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:55,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:55,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:55,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:55,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:55,209 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:55,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:55,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:55,297 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:55,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:55,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:55,362 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:55,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:55,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:55,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:55,431 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:55,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:55,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:55,491 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:55,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:55,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:55,544 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:55,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:55,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:55,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:55,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:55,619 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:55,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:55,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:55,720 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:55,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:55,785 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:33:55,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:33:55,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:55,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:55,891 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:33:55,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 14:33:55,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:55,997 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:55,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:56,027 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:33:56,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:33:56,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:56,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:56,141 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:33:56,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:33:56,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:56,260 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:56,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:56,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:56,310 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:56,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:56,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:56,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:56,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:56,376 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:56,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:56,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:56,466 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:56,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:56,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:56,534 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:56,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:56,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:56,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:56,618 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:56,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:56,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:56,691 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:56,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:56,725 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:33:56,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:33:56,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:56,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:56,833 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:33:56,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:33:56,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:56,957 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:56,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:56,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:56,992 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:56,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:57,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:57,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:57,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:57,059 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:33:57,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:33:57,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:57,144 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:33:57,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:33:57,176 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:33:57,834 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2885#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-23 14:33:57,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:33:57,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:33:57,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-23 14:33:57,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79205314] [2022-11-23 14:33:57,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:33:57,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 14:33:57,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:57,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 14:33:57,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 14:33:57,838 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:58,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:58,331 INFO L93 Difference]: Finished difference Result 179 states and 253 transitions. [2022-11-23 14:33:58,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-23 14:33:58,332 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-23 14:33:58,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:58,333 INFO L225 Difference]: With dead ends: 179 [2022-11-23 14:33:58,333 INFO L226 Difference]: Without dead ends: 129 [2022-11-23 14:33:58,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 14:33:58,335 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:58,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:33:58,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-23 14:33:58,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-11-23 14:33:58,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0859375) internal successors, (139), 128 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:58,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2022-11-23 14:33:58,361 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 72 [2022-11-23 14:33:58,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:58,363 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2022-11-23 14:33:58,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:33:58,364 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2022-11-23 14:33:58,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-23 14:33:58,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:58,372 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:33:58,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:33:58,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 14:33:58,581 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:33:58,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:58,582 INFO L85 PathProgramCache]: Analyzing trace with hash -690482320, now seen corresponding path program 6 times [2022-11-23 14:33:58,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:58,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554733171] [2022-11-23 14:33:58,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:58,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-23 14:34:00,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:00,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554733171] [2022-11-23 14:34:00,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554733171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:34:00,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075290173] [2022-11-23 14:34:00,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:34:00,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:34:00,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:34:00,026 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:34:00,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:34:00,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:34:00,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:34:00,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:34:00,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:34:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-23 14:34:00,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:34:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-23 14:34:01,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075290173] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:34:01,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1602760891] [2022-11-23 14:34:01,512 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:34:01,512 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:34:01,512 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:34:01,513 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:34:01,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:34:01,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:01,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:01,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:01,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:01,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:01,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:01,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:01,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:01,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:01,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:02,728 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-23 14:34:02,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-23 14:34:02,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:02,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:02,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:02,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:02,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:02,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:02,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:02,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:02,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:02,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:02,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 76 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 67 [2022-11-23 14:34:02,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:02,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:34:03,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:03,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:03,391 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 14:34:03,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 988 treesize of output 976 [2022-11-23 14:34:03,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:34:03,752 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:34:03,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:34:03,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:03,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:03,843 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:34:03,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:34:03,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:03,942 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:03,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:03,977 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:34:03,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:34:04,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,112 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:34:04,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 14:34:04,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,235 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:04,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:04,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,271 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:04,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:04,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:04,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,341 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:34:04,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:34:04,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,438 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:04,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:04,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,521 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:04,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:04,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:04,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,584 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:34:04,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:34:04,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,652 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:04,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:04,688 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:34:04,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:34:04,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,806 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:34:04,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:34:04,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,895 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:04,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:04,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,935 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:04,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:05,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:05,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:05,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:05,019 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:34:05,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:34:05,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:05,115 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:05,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:05,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:05,190 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:05,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:05,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:05,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:05,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:05,277 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:34:05,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:34:05,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:05,345 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:05,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:05,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:05,388 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:05,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:05,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:05,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:05,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:05,465 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:34:05,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:34:05,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:05,531 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:05,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:05,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:05,569 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:05,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:05,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:05,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:05,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:05,638 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:34:05,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:34:05,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:05,729 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:05,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:05,761 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:34:08,553 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4299#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-23 14:34:08,553 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:34:08,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:34:08,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-23 14:34:08,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874261310] [2022-11-23 14:34:08,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:34:08,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-23 14:34:08,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:08,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-23 14:34:08,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-23 14:34:08,558 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 50 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:08,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:08,752 INFO L93 Difference]: Finished difference Result 258 states and 302 transitions. [2022-11-23 14:34:08,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-23 14:34:08,753 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 50 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-11-23 14:34:08,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:08,754 INFO L225 Difference]: With dead ends: 258 [2022-11-23 14:34:08,754 INFO L226 Difference]: Without dead ends: 154 [2022-11-23 14:34:08,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 317 SyntacticMatches, 33 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-23 14:34:08,757 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:08,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:34:08,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-23 14:34:08,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-11-23 14:34:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0718954248366013) internal successors, (164), 153 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:08,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 164 transitions. [2022-11-23 14:34:08,787 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 164 transitions. Word has length 127 [2022-11-23 14:34:08,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:08,787 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 164 transitions. [2022-11-23 14:34:08,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 50 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:08,788 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 164 transitions. [2022-11-23 14:34:08,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-23 14:34:08,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:08,794 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:34:08,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:34:09,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:34:09,008 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:34:09,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:09,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2108370781, now seen corresponding path program 7 times [2022-11-23 14:34:09,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:09,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196308229] [2022-11-23 14:34:09,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:09,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-23 14:34:12,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:12,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196308229] [2022-11-23 14:34:12,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196308229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:34:12,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756725289] [2022-11-23 14:34:12,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:34:12,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:34:12,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:34:12,843 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:34:12,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:34:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:13,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-23 14:34:13,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:34:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-23 14:34:13,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:34:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-23 14:34:17,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756725289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:34:17,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1580407755] [2022-11-23 14:34:17,073 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:34:17,074 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:34:17,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:34:17,074 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:34:17,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:34:17,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:17,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:17,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:17,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:17,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:17,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:17,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:17,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:17,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:17,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:17,907 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-23 14:34:17,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-23 14:34:18,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:18,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:18,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:18,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:18,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:18,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:18,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:18,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:18,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:18,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,300 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-23 14:34:19,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-23 14:34:19,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:34:19,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:20,042 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:34:20,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 978 treesize of output 977 [2022-11-23 14:34:20,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:34:20,906 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:34:20,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:34:20,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:20,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:21,008 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:34:21,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:34:21,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:21,096 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:21,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:21,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:21,135 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:21,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:21,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:21,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:21,200 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:34:21,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:34:21,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:21,272 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:21,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:21,311 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:34:21,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:34:21,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:21,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:21,447 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:34:21,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 14:34:21,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:21,558 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:21,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:21,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:21,601 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:21,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:21,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:21,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:21,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:21,665 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:34:21,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:34:21,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:21,744 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:21,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:21,783 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:34:21,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:34:21,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:21,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:21,889 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:34:21,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 14:34:21,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:21,994 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:21,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:22,030 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:34:22,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:34:22,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:22,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:22,132 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:34:22,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:34:22,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:22,226 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:22,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:22,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:22,265 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:22,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:22,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:22,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:22,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:22,340 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:34:22,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:34:22,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:22,406 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:22,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:22,474 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:34:22,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:34:22,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:22,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:22,594 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:34:22,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:34:22,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:22,676 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:22,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:22,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:22,713 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:22,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:22,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:22,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:22,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:22,779 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:34:22,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:34:22,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:22,876 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:22,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:22,911 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:34:24,837 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6121#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-23 14:34:24,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:34:24,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:34:24,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-23 14:34:24,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272055477] [2022-11-23 14:34:24,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:34:24,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-23 14:34:24,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:24,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-23 14:34:24,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-23 14:34:24,846 INFO L87 Difference]: Start difference. First operand 154 states and 164 transitions. Second operand has 101 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 100 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:25,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:25,232 INFO L93 Difference]: Finished difference Result 308 states and 377 transitions. [2022-11-23 14:34:25,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-23 14:34:25,233 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 100 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-23 14:34:25,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:25,235 INFO L225 Difference]: With dead ends: 308 [2022-11-23 14:34:25,235 INFO L226 Difference]: Without dead ends: 204 [2022-11-23 14:34:25,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 389 SyntacticMatches, 11 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-23 14:34:25,239 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:25,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:34:25,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-23 14:34:25,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-11-23 14:34:25,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0541871921182266) internal successors, (214), 203 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:25,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 214 transitions. [2022-11-23 14:34:25,266 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 214 transitions. Word has length 152 [2022-11-23 14:34:25,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:25,269 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 214 transitions. [2022-11-23 14:34:25,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 100 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:25,269 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 214 transitions. [2022-11-23 14:34:25,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-23 14:34:25,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:25,272 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:34:25,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:34:25,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:34:25,481 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:34:25,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:25,482 INFO L85 PathProgramCache]: Analyzing trace with hash -919818941, now seen corresponding path program 8 times [2022-11-23 14:34:25,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:25,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228163503] [2022-11-23 14:34:25,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:25,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:36,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5346 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-23 14:34:36,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:36,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228163503] [2022-11-23 14:34:36,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228163503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:34:36,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481029136] [2022-11-23 14:34:36,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:34:36,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:34:36,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:34:36,639 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:34:36,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:34:53,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 14:34:53,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:34:53,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:34:53,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:34:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5346 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5291 trivial. 0 not checked. [2022-11-23 14:34:54,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:34:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5346 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5291 trivial. 0 not checked. [2022-11-23 14:34:54,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481029136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:34:54,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1859752954] [2022-11-23 14:34:54,910 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:34:54,911 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:34:54,911 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:34:54,911 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:34:54,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:34:55,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:56,348 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-23 14:34:56,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-23 14:34:56,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:56,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:56,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:56,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:56,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:56,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:56,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:56,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:56,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:56,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:56,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 76 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 67 [2022-11-23 14:34:56,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:56,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:34:57,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:57,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:57,235 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 14:34:57,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 988 treesize of output 976 [2022-11-23 14:34:57,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:34:57,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:57,680 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:57,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:57,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:57,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:57,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:57,766 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:34:57,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:34:57,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:57,864 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:57,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:57,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:57,934 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:57,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:57,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:57,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:57,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:58,000 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:34:58,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:34:58,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:58,074 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:58,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:58,114 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:34:58,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:34:58,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:58,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:58,239 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:34:58,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 14:34:58,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:58,359 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:58,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:58,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:58,408 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:58,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:58,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:58,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:58,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:58,481 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:34:58,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:34:58,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:58,554 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:58,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:58,591 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:34:58,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:34:58,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:58,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:58,704 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:34:58,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 14:34:58,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:58,854 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:58,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:58,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:58,896 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:58,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:58,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:58,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:58,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:58,964 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:34:58,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:34:59,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:59,079 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:59,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:59,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:59,143 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:59,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:59,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:59,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:59,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:59,219 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:34:59,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:34:59,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:59,288 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:59,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:59,324 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:34:59,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:34:59,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:59,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:59,434 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:34:59,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 14:34:59,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:59,587 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:59,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:59,635 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:34:59,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:34:59,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:59,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:59,769 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:34:59,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 14:34:59,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:59,885 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:34:59,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:34:59,915 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:35:01,322 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8465#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-23 14:35:01,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:35:01,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:35:01,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-11-23 14:35:01,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654565927] [2022-11-23 14:35:01,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:35:01,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-23 14:35:01,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:01,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-23 14:35:01,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-23 14:35:01,331 INFO L87 Difference]: Start difference. First operand 204 states and 214 transitions. Second operand has 123 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 123 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:02,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:02,403 INFO L93 Difference]: Finished difference Result 417 states and 545 transitions. [2022-11-23 14:35:02,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-23 14:35:02,404 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 123 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2022-11-23 14:35:02,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:02,406 INFO L225 Difference]: With dead ends: 417 [2022-11-23 14:35:02,407 INFO L226 Difference]: Without dead ends: 313 [2022-11-23 14:35:02,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-23 14:35:02,412 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:02,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:35:02,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-23 14:35:02,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2022-11-23 14:35:02,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.0352564102564104) internal successors, (323), 312 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:02,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 323 transitions. [2022-11-23 14:35:02,446 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 323 transitions. Word has length 202 [2022-11-23 14:35:02,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:02,447 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 323 transitions. [2022-11-23 14:35:02,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 123 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:02,448 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 323 transitions. [2022-11-23 14:35:02,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-11-23 14:35:02,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:02,454 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:02,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:35:02,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 14:35:02,655 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:02,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:02,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2031454384, now seen corresponding path program 9 times [2022-11-23 14:35:02,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:02,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742593620] [2022-11-23 14:35:02,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:02,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:14,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-23 14:35:14,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:14,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742593620] [2022-11-23 14:35:14,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742593620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:35:14,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016900986] [2022-11-23 14:35:14,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:35:14,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:35:14,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:35:14,567 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:35:14,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:35:15,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:35:15,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:35:15,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 2534 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-23 14:35:15,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-23 14:35:15,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:35:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-23 14:35:30,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016900986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:35:30,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1874525911] [2022-11-23 14:35:30,913 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:35:30,914 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:35:30,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:35:30,914 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:35:30,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:35:30,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:30,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:30,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:30,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:30,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:30,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:30,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:30,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:30,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:30,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:31,835 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-23 14:35:31,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-23 14:35:31,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:31,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:31,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:31,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:31,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:31,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:31,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:31,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:31,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:31,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:33,225 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-23 14:35:33,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-23 14:35:33,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:33,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:35:33,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:33,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:33,918 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 14:35:33,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 988 treesize of output 976 [2022-11-23 14:35:34,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:35:34,355 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:35:34,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:35:34,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:34,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:34,467 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:35:34,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 14:35:34,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:34,619 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:35:34,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:35:34,657 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:35:34,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:35:34,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:34,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:34,784 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:35:34,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 14:35:34,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:34,989 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:35:34,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:35:35,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:35,043 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:35:35,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:35:35,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:35,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:35,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:35,123 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:35:35,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:35:35,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:35,227 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:35:35,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:35:35,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:35,309 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:35:35,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:35:35,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:35,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:35,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:35,391 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:35:35,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:35:35,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:35,463 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:35:35,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:35:35,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:35,506 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:35:35,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:35:35,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:35,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:35,582 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:35:35,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:35:35,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:35,660 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:35:35,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:35:35,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:35,700 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:35:35,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:35:35,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:35,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:35,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:35,773 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:35:35,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:35:35,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:35,868 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:35:35,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:35:35,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:35,938 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:35:35,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:35:35,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:35,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:36,010 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:35:36,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:35:36,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:36,082 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:35:36,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:35:36,123 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:35:36,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:35:36,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:36,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:36,252 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:35:36,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:35:36,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:36,359 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:35:36,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:35:36,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:36,398 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:35:36,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:35:36,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:36,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:36,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:36,465 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:35:36,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:35:36,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:36,565 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:35:36,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:35:36,600 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:35:52,288 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11979#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-23 14:35:52,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:35:52,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:35:52,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-23 14:35:52,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765619857] [2022-11-23 14:35:52,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:35:52,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-23 14:35:52,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:52,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-23 14:35:52,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-23 14:35:52,301 INFO L87 Difference]: Start difference. First operand 313 states and 323 transitions. Second operand has 203 states, 203 states have (on average 1.1083743842364533) internal successors, (225), 202 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:53,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:53,060 INFO L93 Difference]: Finished difference Result 626 states and 746 transitions. [2022-11-23 14:35:53,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-23 14:35:53,061 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.1083743842364533) internal successors, (225), 202 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 311 [2022-11-23 14:35:53,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:53,064 INFO L225 Difference]: With dead ends: 626 [2022-11-23 14:35:53,064 INFO L226 Difference]: Without dead ends: 414 [2022-11-23 14:35:53,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1032 GetRequests, 757 SyntacticMatches, 69 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22596 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-23 14:35:53,069 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:53,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:35:53,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-23 14:35:53,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 414. [2022-11-23 14:35:53,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.026634382566586) internal successors, (424), 413 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:53,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 424 transitions. [2022-11-23 14:35:53,094 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 424 transitions. Word has length 311 [2022-11-23 14:35:53,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:53,094 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 424 transitions. [2022-11-23 14:35:53,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.1083743842364533) internal successors, (225), 202 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:53,095 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 424 transitions. [2022-11-23 14:35:53,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2022-11-23 14:35:53,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:53,104 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:53,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:35:53,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 14:35:53,316 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:53,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:53,317 INFO L85 PathProgramCache]: Analyzing trace with hash 942571171, now seen corresponding path program 10 times [2022-11-23 14:35:53,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:53,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790649569] [2022-11-23 14:35:53,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:53,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 22377 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-23 14:36:28,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:36:28,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790649569] [2022-11-23 14:36:28,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790649569] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:36:28,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135834736] [2022-11-23 14:36:28,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:36:28,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:36:28,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:36:28,563 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:36:28,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:36:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:29,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 3443 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-23 14:36:29,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:36:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 22377 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-23 14:36:30,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:37:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 22377 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-23 14:37:21,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135834736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:37:21,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [515754010] [2022-11-23 14:37:21,827 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:37:21,827 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:37:21,828 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:37:21,828 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:37:21,828 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:37:21,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:21,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:21,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:21,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:21,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:21,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:21,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:21,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:21,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:21,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:22,612 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-23 14:37:22,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-23 14:37:22,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:22,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:22,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:22,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:22,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:22,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:22,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:22,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:22,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:22,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:23,812 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-23 14:37:23,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-23 14:37:23,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:23,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:37:24,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:24,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:24,555 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:37:24,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 978 treesize of output 977 [2022-11-23 14:37:25,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:37:25,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:25,285 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:37:25,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:37:25,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:25,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:25,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:25,343 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:37:25,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:37:25,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:25,442 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:37:25,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:37:25,498 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:37:25,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:37:25,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:25,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:25,627 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:37:25,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 14:37:25,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:25,771 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:37:25,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:37:25,807 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:37:25,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:37:25,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:25,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:25,906 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:37:25,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:37:25,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:25,989 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:37:25,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:37:26,027 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:37:26,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:37:26,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:26,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:26,133 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:37:26,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:37:26,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:26,229 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:37:26,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:37:26,264 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:37:26,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:37:26,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:26,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:26,363 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:37:26,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 14:37:26,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:26,499 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:37:26,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:37:26,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:26,541 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:37:26,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:37:26,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:26,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:26,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:26,681 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:37:26,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:37:26,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:26,791 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:37:26,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:37:26,856 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:37:26,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:37:26,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:26,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:26,970 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:37:26,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 14:37:27,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:27,070 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:37:27,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:37:27,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:27,108 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:37:27,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:37:27,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:27,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:27,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:27,167 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:37:27,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:37:27,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:27,238 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:37:27,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:37:27,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:27,274 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:37:27,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:37:27,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:27,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:27,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:27,339 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:37:27,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 14:37:27,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:27,425 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:37:27,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:37:27,456 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:37:29,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16921#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-23 14:37:29,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:37:29,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:37:29,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-23 14:37:29,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148767214] [2022-11-23 14:37:29,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:37:29,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-23 14:37:29,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:37:29,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-23 14:37:29,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-23 14:37:29,487 INFO L87 Difference]: Start difference. First operand 414 states and 424 transitions. Second operand has 405 states, 405 states have (on average 1.054320987654321) internal successors, (427), 404 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:37:32,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:37:32,358 INFO L93 Difference]: Finished difference Result 828 states and 1049 transitions. [2022-11-23 14:37:32,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-23 14:37:32,360 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.054320987654321) internal successors, (427), 404 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 412 [2022-11-23 14:37:32,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:37:32,363 INFO L225 Difference]: With dead ends: 828 [2022-11-23 14:37:32,363 INFO L226 Difference]: Without dead ends: 616 [2022-11-23 14:37:32,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1436 GetRequests, 1028 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 70.3s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-23 14:37:32,373 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:37:32,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:37:32,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-11-23 14:37:32,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2022-11-23 14:37:32,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 1.0178861788617886) internal successors, (626), 615 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:37:32,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 626 transitions. [2022-11-23 14:37:32,401 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 626 transitions. Word has length 412 [2022-11-23 14:37:32,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:37:32,402 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 626 transitions. [2022-11-23 14:37:32,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.054320987654321) internal successors, (427), 404 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:37:32,403 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 626 transitions. [2022-11-23 14:37:32,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2022-11-23 14:37:32,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:37:32,418 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:37:32,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-23 14:37:32,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:37:32,631 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:37:32,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:37:32,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1858173245, now seen corresponding path program 11 times [2022-11-23 14:37:32,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:37:32,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015731017] [2022-11-23 14:37:32,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:37:32,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:37:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:39:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 83280 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-23 14:39:40,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:39:40,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015731017] [2022-11-23 14:39:40,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015731017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:39:40,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68788448] [2022-11-23 14:39:40,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:39:40,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:39:40,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:39:41,003 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:39:41,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4fa21d-629e-46dd-9a83-65cd8f7d7111/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process