./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const_m3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const_m3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bd654f01b412711828f8177df5f8f7c2933e3d7436939e6c61fdcced19c9515c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:22:12,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:22:12,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:22:12,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:22:12,348 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:22:12,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:22:12,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:22:12,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:22:12,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:22:12,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:22:12,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:22:12,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:22:12,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:22:12,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:22:12,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:22:12,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:22:12,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:22:12,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:22:12,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:22:12,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:22:12,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:22:12,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:22:12,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:22:12,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:22:12,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:22:12,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:22:12,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:22:12,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:22:12,418 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:22:12,419 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:22:12,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:22:12,422 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:22:12,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:22:12,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:22:12,427 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:22:12,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:22:12,428 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:22:12,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:22:12,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:22:12,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:22:12,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:22:12,431 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:22:12,477 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:22:12,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:22:12,478 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:22:12,478 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:22:12,479 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:22:12,479 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:22:12,480 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:22:12,480 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:22:12,480 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:22:12,481 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:22:12,482 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:22:12,482 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:22:12,483 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:22:12,483 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:22:12,483 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:22:12,484 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:22:12,484 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:22:12,484 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:22:12,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:22:12,486 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:22:12,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:22:12,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:22:12,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:22:12,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:22:12,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:22:12,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:22:12,488 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:22:12,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:22:12,489 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:22:12,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:22:12,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:22:12,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:22:12,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:22:12,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:22:12,491 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:22:12,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:22:12,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:22:12,492 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:22:12,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:22:12,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:22:12,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:22:12,495 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_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd654f01b412711828f8177df5f8f7c2933e3d7436939e6c61fdcced19c9515c [2022-11-26 00:22:12,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:22:12,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:22:12,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:22:12,866 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:22:12,869 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:22:12,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-crafted/zero_sum_const_m3.c [2022-11-26 00:22:15,880 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:22:16,056 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:22:16,056 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/sv-benchmarks/c/array-crafted/zero_sum_const_m3.c [2022-11-26 00:22:16,062 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/data/3f80e7ef8/c46ada65da834e5fbdba8730853def50/FLAG021fdce5a [2022-11-26 00:22:16,079 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/data/3f80e7ef8/c46ada65da834e5fbdba8730853def50 [2022-11-26 00:22:16,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:22:16,085 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:22:16,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:22:16,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:22:16,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:22:16,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:22:16" (1/1) ... [2022-11-26 00:22:16,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@278cda15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:16, skipping insertion in model container [2022-11-26 00:22:16,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:22:16" (1/1) ... [2022-11-26 00:22:16,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:22:16,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:22:16,264 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_32f04a38-f9ef-462b-bf85-534e7a85fadb/sv-benchmarks/c/array-crafted/zero_sum_const_m3.c[408,421] [2022-11-26 00:22:16,289 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:22:16,301 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:22:16,316 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_32f04a38-f9ef-462b-bf85-534e7a85fadb/sv-benchmarks/c/array-crafted/zero_sum_const_m3.c[408,421] [2022-11-26 00:22:16,326 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:22:16,343 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:22:16,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:16 WrapperNode [2022-11-26 00:22:16,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:22:16,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:22:16,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:22:16,346 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:22:16,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:16" (1/1) ... [2022-11-26 00:22:16,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:16" (1/1) ... [2022-11-26 00:22:16,411 INFO L138 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 104 [2022-11-26 00:22:16,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:22:16,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:22:16,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:22:16,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:22:16,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:16" (1/1) ... [2022-11-26 00:22:16,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:16" (1/1) ... [2022-11-26 00:22:16,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:16" (1/1) ... [2022-11-26 00:22:16,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:16" (1/1) ... [2022-11-26 00:22:16,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:16" (1/1) ... [2022-11-26 00:22:16,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:16" (1/1) ... [2022-11-26 00:22:16,456 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:16" (1/1) ... [2022-11-26 00:22:16,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:16" (1/1) ... [2022-11-26 00:22:16,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:22:16,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:22:16,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:22:16,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:22:16,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:16" (1/1) ... [2022-11-26 00:22:16,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:22:16,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:16,501 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:22:16,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:22:16,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:22:16,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:22:16,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:22:16,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:22:16,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:22:16,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:22:16,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:22:16,615 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:22:16,616 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:22:16,790 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:22:16,864 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:22:16,864 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-26 00:22:16,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:22:16 BoogieIcfgContainer [2022-11-26 00:22:16,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:22:16,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:22:16,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:22:16,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:22:16,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:22:16" (1/3) ... [2022-11-26 00:22:16,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0b54e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:22:16, skipping insertion in model container [2022-11-26 00:22:16,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:16" (2/3) ... [2022-11-26 00:22:16,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0b54e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:22:16, skipping insertion in model container [2022-11-26 00:22:16,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:22:16" (3/3) ... [2022-11-26 00:22:16,881 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m3.c [2022-11-26 00:22:16,919 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:22:16,923 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:22:17,019 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:22:17,025 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;@5b5fa927, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:22:17,025 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:22:17,029 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:17,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:22:17,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:17,036 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:17,036 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:17,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:17,041 INFO L85 PathProgramCache]: Analyzing trace with hash 245696831, now seen corresponding path program 1 times [2022-11-26 00:22:17,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:17,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654640477] [2022-11-26 00:22:17,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:17,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:17,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:17,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654640477] [2022-11-26 00:22:17,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654640477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:17,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:17,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:22:17,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748708938] [2022-11-26 00:22:17,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:17,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:22:17,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:17,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:22:17,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:22:17,390 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-26 00:22:17,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:17,461 INFO L93 Difference]: Finished difference Result 28 states and 43 transitions. [2022-11-26 00:22:17,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:22:17,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2022-11-26 00:22:17,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:17,472 INFO L225 Difference]: With dead ends: 28 [2022-11-26 00:22:17,472 INFO L226 Difference]: Without dead ends: 13 [2022-11-26 00:22:17,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:22:17,479 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:17,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:22:17,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-26 00:22:17,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-26 00:22:17,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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) [2022-11-26 00:22:17,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2022-11-26 00:22:17,527 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 19 transitions. Word has length 11 [2022-11-26 00:22:17,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:17,528 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 19 transitions. [2022-11-26 00:22:17,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-26 00:22:17,529 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 19 transitions. [2022-11-26 00:22:17,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:22:17,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:17,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:17,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:22:17,534 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:17,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:17,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1556405487, now seen corresponding path program 1 times [2022-11-26 00:22:17,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:17,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050062353] [2022-11-26 00:22:17,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:17,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:22:17,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:17,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050062353] [2022-11-26 00:22:17,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050062353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:17,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:17,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:22:17,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328938229] [2022-11-26 00:22:17,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:17,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:22:17,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:17,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:22:17,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:22:17,648 INFO L87 Difference]: Start difference. First operand 13 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-11-26 00:22:17,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:17,705 INFO L93 Difference]: Finished difference Result 27 states and 43 transitions. [2022-11-26 00:22:17,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:22:17,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-26 00:22:17,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:17,707 INFO L225 Difference]: With dead ends: 27 [2022-11-26 00:22:17,707 INFO L226 Difference]: Without dead ends: 19 [2022-11-26 00:22:17,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:22:17,709 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:17,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 5 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:22:17,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-26 00:22:17,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-26 00:22:17,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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) [2022-11-26 00:22:17,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-11-26 00:22:17,718 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 12 [2022-11-26 00:22:17,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:17,718 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-11-26 00:22:17,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-11-26 00:22:17,719 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-11-26 00:22:17,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-26 00:22:17,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:17,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:17,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:22:17,721 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:17,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:17,722 INFO L85 PathProgramCache]: Analyzing trace with hash 958119109, now seen corresponding path program 1 times [2022-11-26 00:22:17,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:17,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839636804] [2022-11-26 00:22:17,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:17,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:22:17,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:17,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839636804] [2022-11-26 00:22:17,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839636804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:22:17,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72014894] [2022-11-26 00:22:17,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:17,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:17,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:17,866 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:22:17,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:22:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:17,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:22:17,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:22:18,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:22:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:22:18,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72014894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:22:18,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [24328698] [2022-11-26 00:22:18,152 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:22:18,155 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:22:18,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:22:18,165 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:22:18,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:22:18,351 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:22:18,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:22:18,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:22:18,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:22:18,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:18,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:18,697 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:22:18,698 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 250 treesize of output 247 [2022-11-26 00:22:18,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:22:19,181 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:22:19,439 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '278#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:22:19,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:22:19,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:22:19,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-26 00:22:19,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349815758] [2022-11-26 00:22:19,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:22:19,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:22:19,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:19,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:22:19,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:22:19,446 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:19,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:19,529 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2022-11-26 00:22:19,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:22:19,530 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-26 00:22:19,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:19,532 INFO L225 Difference]: With dead ends: 35 [2022-11-26 00:22:19,532 INFO L226 Difference]: Without dead ends: 20 [2022-11-26 00:22:19,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:22:19,537 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:19,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:22:19,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-26 00:22:19,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-26 00:22:19,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 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) [2022-11-26 00:22:19,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-11-26 00:22:19,548 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 18 [2022-11-26 00:22:19,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:19,548 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-11-26 00:22:19,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:19,549 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2022-11-26 00:22:19,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:22:19,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:19,550 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:19,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:22:19,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:19,755 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:19,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:19,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1662557419, now seen corresponding path program 2 times [2022-11-26 00:22:19,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:19,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011936857] [2022-11-26 00:22:19,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:19,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:22:19,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:19,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011936857] [2022-11-26 00:22:19,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011936857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:22:19,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154236370] [2022-11-26 00:22:19,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:22:19,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:19,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:19,864 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:22:19,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:22:19,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:22:19,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:22:19,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:22:19,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:22:19,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:22:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:22:20,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154236370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:22:20,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [427798377] [2022-11-26 00:22:20,020 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:22:20,020 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:22:20,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:22:20,021 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:22:20,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:22:20,102 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:22:20,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:22:20,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:22:20,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:22:20,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:20,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:20,289 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:22:20,290 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 250 treesize of output 247 [2022-11-26 00:22:20,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:22:20,637 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:22:20,902 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '496#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:22:20,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:22:20,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:22:20,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-26 00:22:20,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249325837] [2022-11-26 00:22:20,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:22:20,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:22:20,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:20,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:22:20,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:22:20,904 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:20,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:20,985 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2022-11-26 00:22:20,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:22:20,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-26 00:22:20,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:20,987 INFO L225 Difference]: With dead ends: 39 [2022-11-26 00:22:20,987 INFO L226 Difference]: Without dead ends: 26 [2022-11-26 00:22:20,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:22:20,988 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:20,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 11 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:22:20,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-26 00:22:20,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-26 00:22:20,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 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) [2022-11-26 00:22:20,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-11-26 00:22:20,993 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 19 [2022-11-26 00:22:20,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:20,994 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-11-26 00:22:20,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:20,994 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-11-26 00:22:20,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 00:22:20,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:20,995 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:21,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-26 00:22:21,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:21,195 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:21,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:21,196 INFO L85 PathProgramCache]: Analyzing trace with hash 669056191, now seen corresponding path program 3 times [2022-11-26 00:22:21,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:21,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98179088] [2022-11-26 00:22:21,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:21,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:23,652 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:23,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:23,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98179088] [2022-11-26 00:22:23,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98179088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:22:23,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248038802] [2022-11-26 00:22:23,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:22:23,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:23,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:23,656 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:22:23,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:22:23,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:22:23,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:22:23,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-26 00:22:23,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:23,830 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 15 treesize of output 11 [2022-11-26 00:22:24,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-26 00:22:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:22:24,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:22:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:26,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248038802] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:22:26,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1692355963] [2022-11-26 00:22:26,356 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:22:26,356 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:22:26,357 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:22:26,357 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:22:26,357 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:22:26,430 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:22:26,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:22:26,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:22:26,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:22:26,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:26,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:26,561 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:22:26,562 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 250 treesize of output 247 [2022-11-26 00:22:26,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:22:26,804 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:22:27,349 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '811#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:22:27,349 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:22:27,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:22:27,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 22] total 49 [2022-11-26 00:22:27,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323506497] [2022-11-26 00:22:27,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:22:27,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-26 00:22:27,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:27,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-26 00:22:27,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2661, Unknown=0, NotChecked=0, Total=2862 [2022-11-26 00:22:27,352 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 49 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 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) [2022-11-26 00:22:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:29,162 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-11-26 00:22:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-26 00:22:29,163 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 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 25 [2022-11-26 00:22:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:29,164 INFO L225 Difference]: With dead ends: 45 [2022-11-26 00:22:29,164 INFO L226 Difference]: Without dead ends: 42 [2022-11-26 00:22:29,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 33 SyntacticMatches, 12 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=335, Invalid=4221, Unknown=0, NotChecked=0, Total=4556 [2022-11-26 00:22:29,166 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:29,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 59 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:22:29,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-26 00:22:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-11-26 00:22:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:29,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2022-11-26 00:22:29,183 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 25 [2022-11-26 00:22:29,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:29,184 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2022-11-26 00:22:29,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 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) [2022-11-26 00:22:29,187 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2022-11-26 00:22:29,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-26 00:22:29,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:29,189 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:29,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:22:29,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:29,394 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:29,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:29,395 INFO L85 PathProgramCache]: Analyzing trace with hash 294022802, now seen corresponding path program 4 times [2022-11-26 00:22:29,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:29,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267866860] [2022-11-26 00:22:29,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:29,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:22:29,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:29,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267866860] [2022-11-26 00:22:29,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267866860] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:22:29,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076940439] [2022-11-26 00:22:29,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:22:29,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:29,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:29,516 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:22:29,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:22:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:29,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:22:29,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:22:29,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:22:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:22:29,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076940439] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:22:29,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1033173046] [2022-11-26 00:22:29,730 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:22:29,730 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:22:29,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:22:29,735 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:22:29,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:22:29,814 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:22:29,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:22:29,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:22:29,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:22:29,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:29,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:29,970 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:22:29,970 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 250 treesize of output 247 [2022-11-26 00:22:30,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:22:30,225 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:22:30,482 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1164#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:22:30,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:22:30,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:22:30,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-11-26 00:22:30,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165369801] [2022-11-26 00:22:30,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:22:30,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:22:30,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:30,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:22:30,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:22:30,484 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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) [2022-11-26 00:22:30,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:30,720 INFO L93 Difference]: Finished difference Result 88 states and 113 transitions. [2022-11-26 00:22:30,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:22:30,720 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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 26 [2022-11-26 00:22:30,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:30,721 INFO L225 Difference]: With dead ends: 88 [2022-11-26 00:22:30,721 INFO L226 Difference]: Without dead ends: 51 [2022-11-26 00:22:30,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:22:30,723 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:30,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 15 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:22:30,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-26 00:22:30,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2022-11-26 00:22:30,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 states have internal predecessors, (54), 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) [2022-11-26 00:22:30,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2022-11-26 00:22:30,736 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 26 [2022-11-26 00:22:30,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:30,737 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2022-11-26 00:22:30,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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) [2022-11-26 00:22:30,737 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2022-11-26 00:22:30,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-26 00:22:30,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:30,738 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:30,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:22:30,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:22:30,945 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:30,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:30,945 INFO L85 PathProgramCache]: Analyzing trace with hash 799982818, now seen corresponding path program 5 times [2022-11-26 00:22:30,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:30,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372380737] [2022-11-26 00:22:30,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:30,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:30,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:22:31,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:31,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372380737] [2022-11-26 00:22:31,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372380737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:22:31,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80305136] [2022-11-26 00:22:31,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:22:31,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:31,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:31,094 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:22:31,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:22:31,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:22:31,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:22:31,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:22:31,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:22:31,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:22:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:22:31,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80305136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:22:31,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [583878321] [2022-11-26 00:22:31,337 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:22:31,337 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:22:31,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:22:31,338 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:22:31,338 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:22:31,415 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:22:31,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:22:31,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:22:31,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:22:31,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:31,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:22:31,577 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:22:31,578 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 245 treesize of output 248 [2022-11-26 00:22:31,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:22:31,851 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:22:32,088 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1590#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:22:32,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:22:32,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:22:32,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-26 00:22:32,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502775718] [2022-11-26 00:22:32,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:22:32,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:22:32,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:32,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:22:32,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:22:32,091 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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) [2022-11-26 00:22:32,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:32,315 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2022-11-26 00:22:32,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:22:32,318 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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 27 [2022-11-26 00:22:32,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:32,318 INFO L225 Difference]: With dead ends: 48 [2022-11-26 00:22:32,318 INFO L226 Difference]: Without dead ends: 33 [2022-11-26 00:22:32,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:22:32,320 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:32,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 15 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:22:32,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-26 00:22:32,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-26 00:22:32,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 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) [2022-11-26 00:22:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-11-26 00:22:32,329 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 27 [2022-11-26 00:22:32,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:32,329 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-11-26 00:22:32,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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) [2022-11-26 00:22:32,330 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-11-26 00:22:32,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-26 00:22:32,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:32,330 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:32,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:22:32,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 00:22:32,537 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:32,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:32,537 INFO L85 PathProgramCache]: Analyzing trace with hash -760189627, now seen corresponding path program 6 times [2022-11-26 00:22:32,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:32,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66764391] [2022-11-26 00:22:32,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:32,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:36,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:36,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66764391] [2022-11-26 00:22:36,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66764391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:22:36,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127348852] [2022-11-26 00:22:36,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:22:36,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:36,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:36,768 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:22:36,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:22:36,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:22:36,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:22:36,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-26 00:22:36,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:22:38,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:22:41,355 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:22:41,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 108 [2022-11-26 00:22:41,644 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-11-26 00:22:41,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 23 [2022-11-26 00:22:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:22:41,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127348852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:22:41,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [63318850] [2022-11-26 00:22:41,896 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:22:41,896 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:22:41,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:22:41,896 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:22:41,897 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:22:41,962 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:22:41,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:22:41,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:22:42,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:22:42,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:42,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:42,087 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:22:42,088 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 250 treesize of output 247 [2022-11-26 00:22:42,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:22:42,337 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:22:43,104 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2016#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:22:43,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:22:43,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:22:43,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 27] total 76 [2022-11-26 00:22:43,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213389274] [2022-11-26 00:22:43,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:22:43,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-26 00:22:43,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:43,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-26 00:22:43,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=6179, Unknown=0, NotChecked=0, Total=6480 [2022-11-26 00:22:43,110 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 76 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 76 states have internal predecessors, (88), 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) [2022-11-26 00:22:53,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:53,806 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2022-11-26 00:22:53,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-26 00:22:53,807 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 76 states have internal predecessors, (88), 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 32 [2022-11-26 00:22:53,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:53,808 INFO L225 Difference]: With dead ends: 89 [2022-11-26 00:22:53,808 INFO L226 Difference]: Without dead ends: 73 [2022-11-26 00:22:53,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3043 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=1005, Invalid=14495, Unknown=0, NotChecked=0, Total=15500 [2022-11-26 00:22:53,813 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 94 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 2668 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 3148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 2668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:53,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 169 Invalid, 3148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 2668 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-26 00:22:53,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-26 00:22:53,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2022-11-26 00:22:53,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 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) [2022-11-26 00:22:53,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-11-26 00:22:53,840 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 32 [2022-11-26 00:22:53,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:53,841 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-11-26 00:22:53,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 76 states have internal predecessors, (88), 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) [2022-11-26 00:22:53,841 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-11-26 00:22:53,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 00:22:53,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:53,842 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:53,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:22:54,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:54,048 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:54,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:54,049 INFO L85 PathProgramCache]: Analyzing trace with hash -2091223540, now seen corresponding path program 7 times [2022-11-26 00:22:54,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:54,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664404172] [2022-11-26 00:22:54,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:54,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 00:22:54,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:54,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664404172] [2022-11-26 00:22:54,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664404172] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:22:54,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241349099] [2022-11-26 00:22:54,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:22:54,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:54,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:54,192 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:22:54,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:22:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:54,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:22:54,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 00:22:54,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:22:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 00:22:54,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241349099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:22:54,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [562204085] [2022-11-26 00:22:54,467 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:22:54,467 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:22:54,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:22:54,468 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:22:54,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:22:54,529 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-26 00:22:54,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-26 00:22:54,600 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:22:54,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:22:54,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:22:54,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:54,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:54,711 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:22:54,717 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 250 treesize of output 247 [2022-11-26 00:22:54,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:22:54,914 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:22:55,156 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2595#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:22:55,156 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:22:55,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:22:55,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-26 00:22:55,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307261502] [2022-11-26 00:22:55,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:22:55,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 00:22:55,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:55,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 00:22:55,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:22:55,158 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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) [2022-11-26 00:22:55,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:55,444 INFO L93 Difference]: Finished difference Result 117 states and 142 transitions. [2022-11-26 00:22:55,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:22:55,445 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 33 [2022-11-26 00:22:55,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:55,446 INFO L225 Difference]: With dead ends: 117 [2022-11-26 00:22:55,446 INFO L226 Difference]: Without dead ends: 54 [2022-11-26 00:22:55,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2022-11-26 00:22:55,447 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:55,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 15 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:22:55,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-26 00:22:55,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2022-11-26 00:22:55,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 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) [2022-11-26 00:22:55,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-11-26 00:22:55,475 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 33 [2022-11-26 00:22:55,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:55,476 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-11-26 00:22:55,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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) [2022-11-26 00:22:55,476 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-11-26 00:22:55,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-26 00:22:55,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:55,477 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:55,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:22:55,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:55,683 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:55,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:55,683 INFO L85 PathProgramCache]: Analyzing trace with hash -49142131, now seen corresponding path program 8 times [2022-11-26 00:22:55,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:55,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984583196] [2022-11-26 00:22:55,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:55,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-26 00:22:55,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:55,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984583196] [2022-11-26 00:22:55,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984583196] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:22:55,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927189256] [2022-11-26 00:22:55,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:22:55,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:55,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:55,871 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:22:55,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:22:55,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:22:55,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:22:55,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:22:55,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-26 00:22:56,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:22:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-26 00:22:56,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927189256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:22:56,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1600718645] [2022-11-26 00:22:56,118 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:22:56,118 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:22:56,118 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:22:56,119 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:22:56,119 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:22:56,179 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:22:56,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:22:56,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:22:56,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:22:56,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:22:56,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:22:56,286 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:22:56,287 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 245 treesize of output 248 [2022-11-26 00:22:56,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:22:56,521 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:22:56,758 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3144#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:22:56,758 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:22:56,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:22:56,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-26 00:22:56,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535031777] [2022-11-26 00:22:56,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:22:56,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 00:22:56,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:56,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 00:22:56,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:22:56,760 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 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) [2022-11-26 00:22:56,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:56,979 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2022-11-26 00:22:56,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:22:56,979 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 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 36 [2022-11-26 00:22:56,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:56,980 INFO L225 Difference]: With dead ends: 51 [2022-11-26 00:22:56,980 INFO L226 Difference]: Without dead ends: 40 [2022-11-26 00:22:56,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 93 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:22:56,981 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:56,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 9 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:22:56,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-26 00:22:56,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-26 00:22:56,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 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) [2022-11-26 00:22:56,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-11-26 00:22:56,993 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 36 [2022-11-26 00:22:56,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:56,994 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-11-26 00:22:56,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 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) [2022-11-26 00:22:56,994 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-11-26 00:22:56,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-26 00:22:56,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:56,995 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:57,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:22:57,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:57,198 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:57,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:57,199 INFO L85 PathProgramCache]: Analyzing trace with hash 110673983, now seen corresponding path program 9 times [2022-11-26 00:22:57,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:57,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072570952] [2022-11-26 00:22:57,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:57,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:23:03,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:23:03,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072570952] [2022-11-26 00:23:03,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072570952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:23:03,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586862567] [2022-11-26 00:23:03,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:23:03,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:23:03,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:23:03,796 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:23:03,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:23:03,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:23:03,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:23:03,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-26 00:23:03,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:23:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:23:06,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:23:10,156 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:23:10,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 69 treesize of output 185 [2022-11-26 00:23:10,726 INFO L321 Elim1Store]: treesize reduction 156, result has 9.8 percent of original size [2022-11-26 00:23:10,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 70 treesize of output 30 [2022-11-26 00:23:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:23:10,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586862567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:23:10,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1712013744] [2022-11-26 00:23:10,839 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:23:10,839 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:23:10,839 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:23:10,839 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:23:10,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:23:10,901 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:23:10,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:23:10,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:23:10,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:23:10,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:23:10,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:23:11,013 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:23:11,014 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 245 treesize of output 248 [2022-11-26 00:23:11,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:23:11,224 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:23:12,027 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3653#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:23:12,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:23:12,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:23:12,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 30, 31] total 91 [2022-11-26 00:23:12,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653081301] [2022-11-26 00:23:12,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:23:12,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-26 00:23:12,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:23:12,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-26 00:23:12,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=8792, Unknown=0, NotChecked=0, Total=9120 [2022-11-26 00:23:12,034 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 91 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 91 states have internal predecessors, (105), 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) [2022-11-26 00:23:19,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:23:19,102 INFO L93 Difference]: Finished difference Result 126 states and 149 transitions. [2022-11-26 00:23:19,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-26 00:23:19,102 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 91 states have internal predecessors, (105), 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 39 [2022-11-26 00:23:19,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:23:19,104 INFO L225 Difference]: With dead ends: 126 [2022-11-26 00:23:19,105 INFO L226 Difference]: Without dead ends: 96 [2022-11-26 00:23:19,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3568 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=593, Invalid=14169, Unknown=0, NotChecked=0, Total=14762 [2022-11-26 00:23:19,109 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 2688 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:23:19,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 121 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2688 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-26 00:23:19,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-26 00:23:19,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2022-11-26 00:23:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 67 states have internal predecessors, (80), 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) [2022-11-26 00:23:19,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2022-11-26 00:23:19,148 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 39 [2022-11-26 00:23:19,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:23:19,148 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2022-11-26 00:23:19,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 91 states have internal predecessors, (105), 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) [2022-11-26 00:23:19,149 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2022-11-26 00:23:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-26 00:23:19,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:23:19,150 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:23:19,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-26 00:23:19,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 00:23:19,355 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:23:19,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:23:19,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1890793717, now seen corresponding path program 10 times [2022-11-26 00:23:19,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:23:19,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235025922] [2022-11-26 00:23:19,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:19,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:23:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-26 00:23:19,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:23:19,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235025922] [2022-11-26 00:23:19,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235025922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:23:19,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498647248] [2022-11-26 00:23:19,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:23:19,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:23:19,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:23:19,541 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:23:19,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:23:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:19,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:23:19,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:23:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-26 00:23:19,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:23:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-26 00:23:19,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498647248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:23:19,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1608119962] [2022-11-26 00:23:19,855 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:23:19,856 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:23:19,856 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:23:19,856 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:23:19,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:23:19,921 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:23:19,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:23:19,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:23:19,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:23:20,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:23:20,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:23:20,028 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:23:20,029 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 250 treesize of output 247 [2022-11-26 00:23:20,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:23:20,223 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:23:20,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4338#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:23:20,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:23:20,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:23:20,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-26 00:23:20,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607734986] [2022-11-26 00:23:20,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:23:20,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:23:20,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:23:20,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:23:20,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:23:20,496 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 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) [2022-11-26 00:23:20,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:23:20,819 INFO L93 Difference]: Finished difference Result 127 states and 150 transitions. [2022-11-26 00:23:20,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:23:20,819 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 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 40 [2022-11-26 00:23:20,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:23:20,820 INFO L225 Difference]: With dead ends: 127 [2022-11-26 00:23:20,820 INFO L226 Difference]: Without dead ends: 73 [2022-11-26 00:23:20,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 98 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:23:20,822 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:23:20,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 17 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:23:20,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-26 00:23:20,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2022-11-26 00:23:20,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 65 states have internal predecessors, (76), 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) [2022-11-26 00:23:20,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2022-11-26 00:23:20,846 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 40 [2022-11-26 00:23:20,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:23:20,846 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2022-11-26 00:23:20,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 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) [2022-11-26 00:23:20,847 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2022-11-26 00:23:20,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-26 00:23:20,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:23:20,848 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:23:20,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:23:21,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:23:21,049 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:23:21,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:23:21,049 INFO L85 PathProgramCache]: Analyzing trace with hash 989785058, now seen corresponding path program 11 times [2022-11-26 00:23:21,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:23:21,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398449858] [2022-11-26 00:23:21,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:21,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:23:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-26 00:23:21,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:23:21,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398449858] [2022-11-26 00:23:21,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398449858] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:23:21,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617714109] [2022-11-26 00:23:21,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:23:21,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:23:21,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:23:21,246 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:23:21,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:23:21,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:23:21,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:23:21,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:23:21,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:23:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-26 00:23:21,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:23:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-26 00:23:21,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617714109] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:23:21,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1812784233] [2022-11-26 00:23:21,613 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:23:21,614 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:23:21,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:23:21,614 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:23:21,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:23:21,673 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-26 00:23:21,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-26 00:23:21,726 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:23:21,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:23:21,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:23:21,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:23:21,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:23:21,823 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:23:21,824 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 250 treesize of output 247 [2022-11-26 00:23:21,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:23:22,013 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:23:22,277 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4980#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:23:22,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:23:22,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:23:22,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-26 00:23:22,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612698678] [2022-11-26 00:23:22,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:23:22,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:23:22,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:23:22,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:23:22,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:23:22,279 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 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) [2022-11-26 00:23:22,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:23:22,576 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-11-26 00:23:22,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:23:22,578 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 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 41 [2022-11-26 00:23:22,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:23:22,578 INFO L225 Difference]: With dead ends: 70 [2022-11-26 00:23:22,579 INFO L226 Difference]: Without dead ends: 47 [2022-11-26 00:23:22,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2022-11-26 00:23:22,580 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:23:22,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 9 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:23:22,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-26 00:23:22,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-26 00:23:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 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) [2022-11-26 00:23:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2022-11-26 00:23:22,603 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 41 [2022-11-26 00:23:22,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:23:22,604 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2022-11-26 00:23:22,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 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) [2022-11-26 00:23:22,604 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2022-11-26 00:23:22,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-26 00:23:22,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:23:22,605 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:23:22,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:23:22,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:23:22,811 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:23:22,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:23:22,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1756344891, now seen corresponding path program 12 times [2022-11-26 00:23:22,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:23:22,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166481083] [2022-11-26 00:23:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:22,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:23:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 6 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:23:31,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:23:31,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166481083] [2022-11-26 00:23:31,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166481083] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:23:31,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846537988] [2022-11-26 00:23:31,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:23:31,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:23:31,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:23:31,604 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:23:31,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:23:31,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:23:31,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:23:31,711 WARN L261 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 130 conjunts are in the unsatisfiable core [2022-11-26 00:23:31,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:23:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:23:35,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:23:41,778 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:23:41,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 86 treesize of output 285 [2022-11-26 00:23:43,574 INFO L321 Elim1Store]: treesize reduction 250, result has 7.7 percent of original size [2022-11-26 00:23:43,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 87 treesize of output 36 [2022-11-26 00:23:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:23:43,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846537988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:23:43,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2025632856] [2022-11-26 00:23:43,729 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:23:43,729 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:23:43,730 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:23:43,730 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:23:43,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:23:43,795 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-26 00:23:43,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-26 00:23:43,848 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:23:43,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:23:43,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:23:43,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:23:43,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:23:43,977 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:23:43,978 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 245 treesize of output 248 [2022-11-26 00:23:44,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:23:44,217 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:23:45,288 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5600#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:23:45,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:23:45,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:23:45,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 36, 37] total 110 [2022-11-26 00:23:45,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994708732] [2022-11-26 00:23:45,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:23:45,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-11-26 00:23:45,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:23:45,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-11-26 00:23:45,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=12720, Unknown=0, NotChecked=0, Total=13110 [2022-11-26 00:23:45,293 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 110 states, 110 states have (on average 1.1272727272727272) internal successors, (124), 110 states have internal predecessors, (124), 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) [2022-11-26 00:24:09,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:09,359 INFO L93 Difference]: Finished difference Result 143 states and 165 transitions. [2022-11-26 00:24:09,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-26 00:24:09,359 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.1272727272727272) internal successors, (124), 110 states have internal predecessors, (124), 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 46 [2022-11-26 00:24:09,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:09,361 INFO L225 Difference]: With dead ends: 143 [2022-11-26 00:24:09,361 INFO L226 Difference]: Without dead ends: 139 [2022-11-26 00:24:09,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7467 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=1882, Invalid=32158, Unknown=0, NotChecked=0, Total=34040 [2022-11-26 00:24:09,365 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 109 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 4232 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 4836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 4232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:09,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 333 Invalid, 4836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 4232 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-26 00:24:09,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-26 00:24:09,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 74. [2022-11-26 00:24:09,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.178082191780822) internal successors, (86), 73 states have internal predecessors, (86), 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) [2022-11-26 00:24:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2022-11-26 00:24:09,409 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 46 [2022-11-26 00:24:09,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:09,409 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2022-11-26 00:24:09,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.1272727272727272) internal successors, (124), 110 states have internal predecessors, (124), 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) [2022-11-26 00:24:09,409 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2022-11-26 00:24:09,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-26 00:24:09,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:09,410 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:24:09,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:24:09,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 00:24:09,617 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:24:09,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:09,618 INFO L85 PathProgramCache]: Analyzing trace with hash -2111710731, now seen corresponding path program 13 times [2022-11-26 00:24:09,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:24:09,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252194720] [2022-11-26 00:24:09,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:09,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:24:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-26 00:24:09,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:24:09,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252194720] [2022-11-26 00:24:09,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252194720] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:24:09,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991091574] [2022-11-26 00:24:09,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:24:09,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:24:09,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:24:09,867 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:24:09,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:24:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:10,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:24:10,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-26 00:24:10,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:24:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-26 00:24:10,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991091574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:24:10,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [854024061] [2022-11-26 00:24:10,237 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:24:10,238 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:24:10,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:24:10,238 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:24:10,238 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:24:10,291 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:24:10,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:24:10,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:24:10,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:24:10,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:24:10,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:24:10,380 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:24:10,381 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 250 treesize of output 247 [2022-11-26 00:24:10,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:24:10,571 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:24:10,826 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6458#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:24:10,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:24:10,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:24:10,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-11-26 00:24:10,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740209596] [2022-11-26 00:24:10,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:24:10,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:24:10,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:24:10,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:24:10,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:24:10,829 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 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) [2022-11-26 00:24:11,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:11,265 INFO L93 Difference]: Finished difference Result 162 states and 189 transitions. [2022-11-26 00:24:11,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:24:11,266 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 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 47 [2022-11-26 00:24:11,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:11,266 INFO L225 Difference]: With dead ends: 162 [2022-11-26 00:24:11,266 INFO L226 Difference]: Without dead ends: 72 [2022-11-26 00:24:11,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 116 SyntacticMatches, 12 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:24:11,268 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 66 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:11,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 17 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:24:11,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-26 00:24:11,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2022-11-26 00:24:11,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.140625) internal successors, (73), 64 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) [2022-11-26 00:24:11,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2022-11-26 00:24:11,303 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 47 [2022-11-26 00:24:11,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:11,303 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2022-11-26 00:24:11,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 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) [2022-11-26 00:24:11,304 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2022-11-26 00:24:11,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-26 00:24:11,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:11,304 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:24:11,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:24:11,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 00:24:11,505 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:24:11,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:11,505 INFO L85 PathProgramCache]: Analyzing trace with hash 774626701, now seen corresponding path program 14 times [2022-11-26 00:24:11,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:24:11,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477047859] [2022-11-26 00:24:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:11,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:24:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-26 00:24:11,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:24:11,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477047859] [2022-11-26 00:24:11,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477047859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:24:11,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629537126] [2022-11-26 00:24:11,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:24:11,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:24:11,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:24:11,743 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:24:11,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:24:11,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:24:11,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:24:11,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:24:11,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-26 00:24:12,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:24:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-26 00:24:12,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629537126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:24:12,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [713500546] [2022-11-26 00:24:12,142 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:24:12,142 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:24:12,142 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:24:12,143 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:24:12,143 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:24:12,192 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-26 00:24:12,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-26 00:24:12,241 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:24:12,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:24:12,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:24:12,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:24:12,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:24:12,320 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:24:12,321 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 250 treesize of output 247 [2022-11-26 00:24:12,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:24:12,505 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:24:12,743 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7227#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:24:12,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:24:12,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:24:12,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-11-26 00:24:12,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644606944] [2022-11-26 00:24:12,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:24:12,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:24:12,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:24:12,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:24:12,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:24:12,745 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2022-11-26 00:24:13,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:13,098 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2022-11-26 00:24:13,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:24:13,098 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 50 [2022-11-26 00:24:13,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:13,099 INFO L225 Difference]: With dead ends: 69 [2022-11-26 00:24:13,099 INFO L226 Difference]: Without dead ends: 54 [2022-11-26 00:24:13,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 12 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:24:13,100 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:13,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 15 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:24:13,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-26 00:24:13,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-11-26 00:24:13,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 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) [2022-11-26 00:24:13,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-11-26 00:24:13,137 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 50 [2022-11-26 00:24:13,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:13,137 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-11-26 00:24:13,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2022-11-26 00:24:13,138 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-11-26 00:24:13,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-26 00:24:13,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:13,139 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:24:13,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-26 00:24:13,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 00:24:13,339 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:24:13,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:13,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1094429761, now seen corresponding path program 15 times [2022-11-26 00:24:13,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:24:13,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097152086] [2022-11-26 00:24:13,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:13,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:24:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 9 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:24,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:24:24,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097152086] [2022-11-26 00:24:24,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097152086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:24:24,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553309023] [2022-11-26 00:24:24,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:24:24,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:24:24,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:24:24,789 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:24:24,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 00:24:24,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:24:24,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:24:24,911 WARN L261 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 162 conjunts are in the unsatisfiable core [2022-11-26 00:24:24,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 6 proven. 126 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:24:30,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:24:39,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:24:39,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 104 treesize of output 408 [2022-11-26 00:24:44,832 INFO L321 Elim1Store]: treesize reduction 366, result has 6.4 percent of original size [2022-11-26 00:24:44,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 103 treesize of output 41 [2022-11-26 00:24:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:24:45,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553309023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:24:45,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [656441606] [2022-11-26 00:24:45,558 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:24:45,558 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:24:45,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:24:45,559 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:24:45,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:24:45,638 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:24:45,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:24:45,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:24:45,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:24:45,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:24:45,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:24:45,740 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:24:45,740 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 245 treesize of output 248 [2022-11-26 00:24:45,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:24:45,954 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:24:47,084 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7933#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:24:47,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:24:47,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:24:47,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 44, 46] total 134 [2022-11-26 00:24:47,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804467347] [2022-11-26 00:24:47,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:24:47,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-11-26 00:24:47,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:24:47,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-11-26 00:24:47,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=18508, Unknown=0, NotChecked=0, Total=19182 [2022-11-26 00:24:47,088 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 134 states, 134 states have (on average 1.0895522388059702) internal successors, (146), 134 states have internal predecessors, (146), 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) [2022-11-26 00:25:23,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:25:23,233 INFO L93 Difference]: Finished difference Result 139 states and 161 transitions. [2022-11-26 00:25:23,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-26 00:25:23,234 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.0895522388059702) internal successors, (146), 134 states have internal predecessors, (146), 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 53 [2022-11-26 00:25:23,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:25:23,235 INFO L225 Difference]: With dead ends: 139 [2022-11-26 00:25:23,235 INFO L226 Difference]: Without dead ends: 114 [2022-11-26 00:25:23,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11727 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=2486, Invalid=42670, Unknown=0, NotChecked=0, Total=45156 [2022-11-26 00:25:23,237 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 102 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 6304 mSolverCounterSat, 843 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 7147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 843 IncrementalHoareTripleChecker+Valid, 6304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:25:23,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 280 Invalid, 7147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [843 Valid, 6304 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-11-26 00:25:23,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-26 00:25:23,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2022-11-26 00:25:23,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.1505376344086022) internal successors, (107), 93 states have internal predecessors, (107), 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) [2022-11-26 00:25:23,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2022-11-26 00:25:23,298 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 53 [2022-11-26 00:25:23,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:25:23,299 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2022-11-26 00:25:23,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.0895522388059702) internal successors, (146), 134 states have internal predecessors, (146), 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) [2022-11-26 00:25:23,299 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2022-11-26 00:25:23,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-26 00:25:23,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:25:23,300 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:25:23,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-26 00:25:23,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:25:23,506 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:25:23,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:25:23,506 INFO L85 PathProgramCache]: Analyzing trace with hash 432234194, now seen corresponding path program 16 times [2022-11-26 00:25:23,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:25:23,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827515010] [2022-11-26 00:25:23,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:25:23,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:25:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:25:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-26 00:25:23,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:25:23,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827515010] [2022-11-26 00:25:23,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827515010] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:25:23,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665679948] [2022-11-26 00:25:23,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:25:23,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:25:23,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:25:23,782 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:25:23,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 00:25:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:25:23,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:25:23,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:25:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-26 00:25:24,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:25:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-26 00:25:24,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665679948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:25:24,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1703469022] [2022-11-26 00:25:24,333 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:25:24,333 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:25:24,334 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:25:24,334 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:25:24,334 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:25:24,399 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:25:24,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:25:24,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:25:24,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:25:24,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:25:24,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:25:24,522 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:25:24,523 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 250 treesize of output 247 [2022-11-26 00:25:24,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:25:24,719 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:25:25,022 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8879#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:25:25,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:25:25,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:25:25,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-11-26 00:25:25,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875808351] [2022-11-26 00:25:25,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:25:25,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 00:25:25,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:25:25,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 00:25:25,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2022-11-26 00:25:25,025 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 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) [2022-11-26 00:25:25,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:25:25,646 INFO L93 Difference]: Finished difference Result 186 states and 211 transitions. [2022-11-26 00:25:25,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:25:25,646 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 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 [2022-11-26 00:25:25,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:25:25,647 INFO L225 Difference]: With dead ends: 186 [2022-11-26 00:25:25,647 INFO L226 Difference]: Without dead ends: 81 [2022-11-26 00:25:25,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 134 SyntacticMatches, 14 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=298, Invalid=1108, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 00:25:25,648 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:25:25,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 15 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:25:25,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-26 00:25:25,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2022-11-26 00:25:25,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1232876712328768) internal successors, (82), 73 states have internal predecessors, (82), 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) [2022-11-26 00:25:25,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2022-11-26 00:25:25,706 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 54 [2022-11-26 00:25:25,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:25:25,706 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2022-11-26 00:25:25,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 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) [2022-11-26 00:25:25,706 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2022-11-26 00:25:25,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-26 00:25:25,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:25:25,707 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:25:25,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-26 00:25:25,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 00:25:25,907 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:25:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:25:25,908 INFO L85 PathProgramCache]: Analyzing trace with hash -952453241, now seen corresponding path program 17 times [2022-11-26 00:25:25,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:25:25,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115183542] [2022-11-26 00:25:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:25:25,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:25:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:25:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-26 00:25:26,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:25:26,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115183542] [2022-11-26 00:25:26,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115183542] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:25:26,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371069099] [2022-11-26 00:25:26,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:25:26,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:25:26,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:25:26,223 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:25:26,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 00:25:26,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 00:25:26,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:25:26,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:25:26,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:25:26,582 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-26 00:25:26,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:25:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-26 00:25:26,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371069099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:25:26,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1251696373] [2022-11-26 00:25:26,755 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:25:26,755 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:25:26,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:25:26,756 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:25:26,756 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:25:26,814 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:25:26,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:25:26,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:25:26,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:25:26,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:25:26,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:25:26,908 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:25:26,909 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 250 treesize of output 247 [2022-11-26 00:25:26,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:25:27,085 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:25:27,389 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9761#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:25:27,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:25:27,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:25:27,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-11-26 00:25:27,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334845822] [2022-11-26 00:25:27,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:25:27,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 00:25:27,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:25:27,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 00:25:27,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2022-11-26 00:25:27,391 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 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) [2022-11-26 00:25:27,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:25:27,813 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2022-11-26 00:25:27,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-26 00:25:27,814 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 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 57 [2022-11-26 00:25:27,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:25:27,814 INFO L225 Difference]: With dead ends: 78 [2022-11-26 00:25:27,814 INFO L226 Difference]: Without dead ends: 61 [2022-11-26 00:25:27,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 143 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=301, Invalid=1259, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:25:27,816 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:25:27,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 11 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:25:27,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-26 00:25:27,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-11-26 00:25:27,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:25:27,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2022-11-26 00:25:27,853 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 57 [2022-11-26 00:25:27,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:25:27,853 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2022-11-26 00:25:27,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 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) [2022-11-26 00:25:27,853 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2022-11-26 00:25:27,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-26 00:25:27,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:25:27,854 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:25:27,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-26 00:25:28,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:25:28,055 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:25:28,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:25:28,055 INFO L85 PathProgramCache]: Analyzing trace with hash -465347003, now seen corresponding path program 18 times [2022-11-26 00:25:28,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:25:28,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11022916] [2022-11-26 00:25:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:25:28,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:25:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:25:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 2 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:25:41,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:25:41,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11022916] [2022-11-26 00:25:41,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11022916] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:25:41,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498849345] [2022-11-26 00:25:41,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:25:41,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:25:41,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:25:41,114 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:25:41,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-26 00:25:41,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:25:41,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:25:41,252 WARN L261 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 178 conjunts are in the unsatisfiable core [2022-11-26 00:25:41,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:25:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:25:48,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:26:01,330 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:26:01,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 121 treesize of output 552 [2022-11-26 00:26:05,990 INFO L321 Elim1Store]: treesize reduction 504, result has 5.4 percent of original size [2022-11-26 00:26:05,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 120 treesize of output 47 [2022-11-26 00:26:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:26:06,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498849345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:26:06,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1259571200] [2022-11-26 00:26:06,203 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:26:06,203 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:26:06,204 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:26:06,204 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:26:06,204 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:26:06,257 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-26 00:26:06,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-26 00:26:06,309 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:26:06,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:26:06,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:26:06,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:26:06,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:26:06,388 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:26:06,389 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 250 treesize of output 247 [2022-11-26 00:26:06,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:26:06,606 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:26:07,974 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10551#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:26:07,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:26:07,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:26:07,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 48, 49] total 148 [2022-11-26 00:26:07,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172180786] [2022-11-26 00:26:07,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:26:07,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-11-26 00:26:07,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:26:07,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-11-26 00:26:07,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=582, Invalid=22674, Unknown=0, NotChecked=0, Total=23256 [2022-11-26 00:26:07,978 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 148 states, 148 states have (on average 1.0945945945945945) internal successors, (162), 148 states have internal predecessors, (162), 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) [2022-11-26 00:26:47,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:26:47,197 INFO L93 Difference]: Finished difference Result 252 states and 284 transitions. [2022-11-26 00:26:47,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-11-26 00:26:47,197 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 1.0945945945945945) internal successors, (162), 148 states have internal predecessors, (162), 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 [2022-11-26 00:26:47,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:26:47,199 INFO L225 Difference]: With dead ends: 252 [2022-11-26 00:26:47,199 INFO L226 Difference]: Without dead ends: 207 [2022-11-26 00:26:47,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12120 ImplicationChecksByTransitivity, 53.4s TimeCoverageRelationStatistics Valid=1845, Invalid=48107, Unknown=0, NotChecked=0, Total=49952 [2022-11-26 00:26:47,202 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 58 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 8262 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 8746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 8262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:26:47,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 533 Invalid, 8746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 8262 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-11-26 00:26:47,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-26 00:26:47,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 114. [2022-11-26 00:26:47,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1327433628318584) internal successors, (128), 113 states have internal predecessors, (128), 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) [2022-11-26 00:26:47,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2022-11-26 00:26:47,297 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 60 [2022-11-26 00:26:47,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:26:47,297 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2022-11-26 00:26:47,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 1.0945945945945945) internal successors, (162), 148 states have internal predecessors, (162), 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) [2022-11-26 00:26:47,298 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2022-11-26 00:26:47,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-26 00:26:47,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:26:47,299 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:26:47,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-26 00:26:47,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:26:47,499 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:26:47,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:26:47,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1830054325, now seen corresponding path program 19 times [2022-11-26 00:26:47,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:26:47,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140287994] [2022-11-26 00:26:47,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:26:47,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:26:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:26:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-26 00:26:47,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:26:47,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140287994] [2022-11-26 00:26:47,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140287994] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:26:47,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937510289] [2022-11-26 00:26:47,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:26:47,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:26:47,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:26:47,848 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:26:47,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-26 00:26:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:26:47,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:26:47,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:26:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-26 00:26:48,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:26:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-26 00:26:48,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937510289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:26:48,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1529495815] [2022-11-26 00:26:48,466 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:26:48,466 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:26:48,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:26:48,467 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:26:48,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:26:48,529 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-26 00:26:48,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-26 00:26:48,583 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:26:48,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:26:48,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:26:48,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:26:48,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:26:48,661 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:26:48,662 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 250 treesize of output 247 [2022-11-26 00:26:48,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:26:48,847 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:26:49,158 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11799#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:26:49,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:26:49,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:26:49,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-11-26 00:26:49,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489679988] [2022-11-26 00:26:49,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:26:49,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-26 00:26:49,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:26:49,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-26 00:26:49,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:26:49,160 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 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) [2022-11-26 00:26:49,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:26:49,871 INFO L93 Difference]: Finished difference Result 200 states and 224 transitions. [2022-11-26 00:26:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 00:26:49,871 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-26 00:26:49,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:26:49,872 INFO L225 Difference]: With dead ends: 200 [2022-11-26 00:26:49,872 INFO L226 Difference]: Without dead ends: 90 [2022-11-26 00:26:49,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 152 SyntacticMatches, 16 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=365, Invalid=1357, Unknown=0, NotChecked=0, Total=1722 [2022-11-26 00:26:49,873 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 33 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:26:49,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 19 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:26:49,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-26 00:26:49,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2022-11-26 00:26:49,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 82 states have internal predecessors, (91), 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) [2022-11-26 00:26:49,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2022-11-26 00:26:49,944 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 61 [2022-11-26 00:26:49,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:26:49,944 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2022-11-26 00:26:49,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 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) [2022-11-26 00:26:49,944 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2022-11-26 00:26:49,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-26 00:26:49,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:26:49,945 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:26:49,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-26 00:26:50,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:26:50,146 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:26:50,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:26:50,146 INFO L85 PathProgramCache]: Analyzing trace with hash -2035907443, now seen corresponding path program 20 times [2022-11-26 00:26:50,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:26:50,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647335561] [2022-11-26 00:26:50,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:26:50,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:26:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:26:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-26 00:26:50,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:26:50,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647335561] [2022-11-26 00:26:50,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647335561] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:26:50,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099786025] [2022-11-26 00:26:50,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:26:50,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:26:50,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:26:50,475 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:26:50,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-26 00:26:50,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 00:26:50,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:26:50,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:26:50,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:26:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-26 00:26:50,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:26:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-26 00:26:51,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099786025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:26:51,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2044029543] [2022-11-26 00:26:51,050 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:26:51,050 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:26:51,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:26:51,050 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:26:51,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:26:51,110 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-26 00:26:51,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-26 00:26:51,164 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:26:51,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:26:51,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:26:51,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:26:51,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:26:51,254 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:26:51,254 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 250 treesize of output 247 [2022-11-26 00:26:51,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:26:51,453 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:26:51,751 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12774#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:26:51,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:26:51,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:26:51,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-11-26 00:26:51,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950574470] [2022-11-26 00:26:51,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:26:51,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-26 00:26:51,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:26:51,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-26 00:26:51,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=899, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:26:51,754 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 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) [2022-11-26 00:26:52,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:26:52,311 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2022-11-26 00:26:52,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-26 00:26:52,312 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 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) Word has length 64 [2022-11-26 00:26:52,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:26:52,312 INFO L225 Difference]: With dead ends: 87 [2022-11-26 00:26:52,312 INFO L226 Difference]: Without dead ends: 68 [2022-11-26 00:26:52,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 169 SyntacticMatches, 16 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=366, Invalid=1526, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 00:26:52,314 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:26:52,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:26:52,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-26 00:26:52,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-26 00:26:52,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 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) [2022-11-26 00:26:52,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2022-11-26 00:26:52,372 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 64 [2022-11-26 00:26:52,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:26:52,372 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2022-11-26 00:26:52,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 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) [2022-11-26 00:26:52,372 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2022-11-26 00:26:52,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-26 00:26:52,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:26:52,373 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:26:52,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-26 00:26:52,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-26 00:26:52,580 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:26:52,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:26:52,580 INFO L85 PathProgramCache]: Analyzing trace with hash 291223359, now seen corresponding path program 21 times [2022-11-26 00:26:52,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:26:52,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877947950] [2022-11-26 00:26:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:26:52,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:26:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 10 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:27:09,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:09,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877947950] [2022-11-26 00:27:09,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877947950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:27:09,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529068953] [2022-11-26 00:27:09,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:27:09,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:09,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:09,899 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:09,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-26 00:27:10,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:27:10,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:27:10,056 WARN L261 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 204 conjunts are in the unsatisfiable core [2022-11-26 00:27:10,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:27:21,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:27:42,037 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:27:42,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 137 treesize of output 717 [2022-11-26 00:27:54,492 INFO L321 Elim1Store]: treesize reduction 664, result has 4.7 percent of original size [2022-11-26 00:27:54,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 138 treesize of output 54 [2022-11-26 00:27:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:27:54,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529068953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:27:54,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [632160447] [2022-11-26 00:27:54,819 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:27:54,819 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:27:54,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:27:54,820 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:27:54,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:27:54,874 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:27:54,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:27:54,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:27:54,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:27:54,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:54,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:27:54,968 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:27:54,968 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 245 treesize of output 248 [2022-11-26 00:27:55,026 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 [2022-11-26 00:27:55,163 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:27:56,955 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13667#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:27:56,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:27:56,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:27:56,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 54, 55] total 167 [2022-11-26 00:27:56,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373561442] [2022-11-26 00:27:56,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:27:56,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-11-26 00:27:56,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:56,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-11-26 00:27:56,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=28773, Unknown=0, NotChecked=0, Total=29412 [2022-11-26 00:27:56,962 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 167 states, 167 states have (on average 1.0838323353293413) internal successors, (181), 167 states have internal predecessors, (181), 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) [2022-11-26 00:29:15,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:15,954 INFO L93 Difference]: Finished difference Result 258 states and 287 transitions. [2022-11-26 00:29:15,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-11-26 00:29:15,955 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 1.0838323353293413) internal successors, (181), 167 states have internal predecessors, (181), 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 67 [2022-11-26 00:29:15,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:15,956 INFO L225 Difference]: With dead ends: 258 [2022-11-26 00:29:15,956 INFO L226 Difference]: Without dead ends: 236 [2022-11-26 00:29:15,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21118 ImplicationChecksByTransitivity, 105.4s TimeCoverageRelationStatistics Valid=3844, Invalid=93812, Unknown=0, NotChecked=0, Total=97656 [2022-11-26 00:29:15,962 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 52 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 8607 mSolverCounterSat, 861 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 9468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 861 IncrementalHoareTripleChecker+Valid, 8607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:15,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 553 Invalid, 9468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [861 Valid, 8607 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2022-11-26 00:29:15,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-11-26 00:29:16,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 117. [2022-11-26 00:29:16,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.1206896551724137) internal successors, (130), 116 states have internal predecessors, (130), 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) [2022-11-26 00:29:16,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 130 transitions. [2022-11-26 00:29:16,073 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 130 transitions. Word has length 67 [2022-11-26 00:29:16,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:16,074 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 130 transitions. [2022-11-26 00:29:16,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 1.0838323353293413) internal successors, (181), 167 states have internal predecessors, (181), 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) [2022-11-26 00:29:16,074 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 130 transitions. [2022-11-26 00:29:16,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-26 00:29:16,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:16,074 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:16,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-26 00:29:16,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-26 00:29:16,275 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:16,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:16,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1641267339, now seen corresponding path program 22 times [2022-11-26 00:29:16,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:16,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587188644] [2022-11-26 00:29:16,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:16,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-26 00:29:16,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:16,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587188644] [2022-11-26 00:29:16,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587188644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:29:16,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171167314] [2022-11-26 00:29:16,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:29:16,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:29:16,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:29:16,580 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:29:16,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-26 00:29:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:16,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:29:16,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:29:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-26 00:29:16,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:29:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-26 00:29:17,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171167314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:29:17,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [963038680] [2022-11-26 00:29:17,145 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:29:17,145 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:29:17,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:29:17,146 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:29:17,146 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:29:17,212 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:29:17,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:29:17,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:29:17,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:29:17,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:17,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:17,301 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:29:17,302 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 250 treesize of output 247 [2022-11-26 00:29:17,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:29:17,483 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:29:17,785 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15118#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:29:17,785 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:29:17,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:29:17,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-11-26 00:29:17,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548443062] [2022-11-26 00:29:17,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:29:17,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-26 00:29:17,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:17,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-26 00:29:17,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1055, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 00:29:17,787 INFO L87 Difference]: Start difference. First operand 117 states and 130 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 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) [2022-11-26 00:29:18,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:18,612 INFO L93 Difference]: Finished difference Result 231 states and 257 transitions. [2022-11-26 00:29:18,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 00:29:18,613 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 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 68 [2022-11-26 00:29:18,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:18,614 INFO L225 Difference]: With dead ends: 231 [2022-11-26 00:29:18,614 INFO L226 Difference]: Without dead ends: 99 [2022-11-26 00:29:18,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 170 SyntacticMatches, 18 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=439, Invalid=1631, Unknown=0, NotChecked=0, Total=2070 [2022-11-26 00:29:18,615 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 36 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:18,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 15 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:29:18,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-26 00:29:18,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2022-11-26 00:29:18,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.098901098901099) internal successors, (100), 91 states have internal predecessors, (100), 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) [2022-11-26 00:29:18,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-11-26 00:29:18,708 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 68 [2022-11-26 00:29:18,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:18,708 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-11-26 00:29:18,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 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) [2022-11-26 00:29:18,709 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-11-26 00:29:18,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 00:29:18,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:18,709 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:18,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-26 00:29:18,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:29:18,910 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:18,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:18,910 INFO L85 PathProgramCache]: Analyzing trace with hash 388931975, now seen corresponding path program 23 times [2022-11-26 00:29:18,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:18,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970290514] [2022-11-26 00:29:18,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:18,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-26 00:29:19,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:19,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970290514] [2022-11-26 00:29:19,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970290514] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:29:19,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703064584] [2022-11-26 00:29:19,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:29:19,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:29:19,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:29:19,280 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:29:19,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-26 00:29:19,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:29:19,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:29:19,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:29:19,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:29:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-26 00:29:19,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:29:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-26 00:29:19,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703064584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:29:19,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [3164984] [2022-11-26 00:29:19,892 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:29:19,892 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:29:19,892 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:29:19,893 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:29:19,893 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:29:19,944 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-26 00:29:19,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-26 00:29:19,996 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:29:19,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:29:20,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:29:20,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:20,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:29:20,094 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:29:20,094 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 245 treesize of output 248 [2022-11-26 00:29:20,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:29:20,271 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:29:20,539 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16220#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:29:20,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:29:20,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:29:20,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-11-26 00:29:20,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94314146] [2022-11-26 00:29:20,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:29:20,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-26 00:29:20,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:20,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-26 00:29:20,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1067, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 00:29:20,542 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 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) [2022-11-26 00:29:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:21,140 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2022-11-26 00:29:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:29:21,141 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 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 71 [2022-11-26 00:29:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:21,141 INFO L225 Difference]: With dead ends: 96 [2022-11-26 00:29:21,141 INFO L226 Difference]: Without dead ends: 75 [2022-11-26 00:29:21,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 180 SyntacticMatches, 18 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=438, Invalid=1818, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 00:29:21,143 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:21,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 11 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:29:21,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-26 00:29:21,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-26 00:29:21,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 74 states have internal predecessors, (81), 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) [2022-11-26 00:29:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2022-11-26 00:29:21,215 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 71 [2022-11-26 00:29:21,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:21,215 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2022-11-26 00:29:21,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 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) [2022-11-26 00:29:21,216 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2022-11-26 00:29:21,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-26 00:29:21,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:21,217 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:21,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-26 00:29:21,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-26 00:29:21,423 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:21,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:21,424 INFO L85 PathProgramCache]: Analyzing trace with hash 701603525, now seen corresponding path program 24 times [2022-11-26 00:29:21,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:21,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208512599] [2022-11-26 00:29:21,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:21,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 15 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:29:42,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:42,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208512599] [2022-11-26 00:29:42,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208512599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:29:42,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41793515] [2022-11-26 00:29:42,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:29:42,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:29:42,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:29:42,071 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:29:42,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-26 00:29:42,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:29:42,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:29:42,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 226 conjunts are in the unsatisfiable core [2022-11-26 00:29:42,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:29:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-26 00:29:53,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:30:13,047 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:13,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 155 treesize of output 906 [2022-11-26 00:30:33,511 INFO L321 Elim1Store]: treesize reduction 846, result has 4.2 percent of original size [2022-11-26 00:30:33,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 154 treesize of output 59 [2022-11-26 00:30:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-26 00:30:33,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41793515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:30:33,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [634443895] [2022-11-26 00:30:33,773 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:30:33,773 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:30:33,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:30:33,773 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:30:33,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:30:33,824 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:30:33,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:30:33,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:30:33,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:30:33,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:33,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:33,904 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:30:33,904 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 250 treesize of output 247 [2022-11-26 00:30:33,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:30:34,069 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:30:35,571 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17201#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:30:35,572 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:30:35,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:30:35,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 60, 61] total 186 [2022-11-26 00:30:35,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743804485] [2022-11-26 00:30:35,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:30:35,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 186 states [2022-11-26 00:30:35,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:30:35,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2022-11-26 00:30:35,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1218, Invalid=35072, Unknown=0, NotChecked=0, Total=36290 [2022-11-26 00:30:35,576 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 186 states, 186 states have (on average 1.075268817204301) internal successors, (200), 186 states have internal predecessors, (200), 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) [2022-11-26 00:31:51,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:31:51,947 INFO L93 Difference]: Finished difference Result 395 states and 455 transitions. [2022-11-26 00:31:51,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2022-11-26 00:31:51,948 INFO L78 Accepts]: Start accepts. Automaton has has 186 states, 186 states have (on average 1.075268817204301) internal successors, (200), 186 states have internal predecessors, (200), 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 74 [2022-11-26 00:31:51,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:31:51,950 INFO L225 Difference]: With dead ends: 395 [2022-11-26 00:31:51,950 INFO L226 Difference]: Without dead ends: 371 [2022-11-26 00:31:51,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36250 ImplicationChecksByTransitivity, 97.3s TimeCoverageRelationStatistics Valid=5306, Invalid=101950, Unknown=0, NotChecked=0, Total=107256 [2022-11-26 00:31:51,958 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 61 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 9395 mSolverCounterSat, 1285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 10680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1285 IncrementalHoareTripleChecker+Valid, 9395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:31:51,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 314 Invalid, 10680 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1285 Valid, 9395 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time] [2022-11-26 00:31:51,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-26 00:31:52,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 135. [2022-11-26 00:31:52,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.1492537313432836) internal successors, (154), 134 states have internal predecessors, (154), 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) [2022-11-26 00:31:52,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 154 transitions. [2022-11-26 00:31:52,152 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 154 transitions. Word has length 74 [2022-11-26 00:31:52,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:31:52,153 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 154 transitions. [2022-11-26 00:31:52,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 186 states, 186 states have (on average 1.075268817204301) internal successors, (200), 186 states have internal predecessors, (200), 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) [2022-11-26 00:31:52,154 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 154 transitions. [2022-11-26 00:31:52,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-26 00:31:52,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:52,155 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:31:52,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-26 00:31:52,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-26 00:31:52,362 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:31:52,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:52,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2074556789, now seen corresponding path program 25 times [2022-11-26 00:31:52,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:31:52,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923578976] [2022-11-26 00:31:52,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:52,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:31:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-11-26 00:31:52,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:31:52,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923578976] [2022-11-26 00:31:52,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923578976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:31:52,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520377011] [2022-11-26 00:31:52,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:31:52,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:52,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:31:52,830 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:31:52,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-26 00:31:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:52,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 00:31:52,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:31:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-11-26 00:31:53,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:31:53,620 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-11-26 00:31:53,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520377011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:31:53,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [95817821] [2022-11-26 00:31:53,621 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:31:53,621 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:31:53,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:31:53,622 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:31:53,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:31:53,686 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:31:53,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:31:53,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:31:53,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:31:53,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:53,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:53,809 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:31:53,809 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 250 treesize of output 247 [2022-11-26 00:31:53,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:31:54,026 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:31:54,409 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18996#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:31:54,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:31:54,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:31:54,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2022-11-26 00:31:54,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826113651] [2022-11-26 00:31:54,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:31:54,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-26 00:31:54,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:31:54,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-26 00:31:54,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1235, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:31:54,412 INFO L87 Difference]: Start difference. First operand 135 states and 154 transitions. Second operand has 35 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 states have internal predecessors, (50), 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) [2022-11-26 00:31:55,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:31:55,695 INFO L93 Difference]: Finished difference Result 348 states and 395 transitions. [2022-11-26 00:31:55,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:31:55,696 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 states have internal predecessors, (50), 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 75 [2022-11-26 00:31:55,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:31:55,697 INFO L225 Difference]: With dead ends: 348 [2022-11-26 00:31:55,697 INFO L226 Difference]: Without dead ends: 155 [2022-11-26 00:31:55,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 188 SyntacticMatches, 20 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=520, Invalid=1930, Unknown=0, NotChecked=0, Total=2450 [2022-11-26 00:31:55,699 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:31:55,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 21 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:31:55,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-26 00:31:55,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 138. [2022-11-26 00:31:55,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.1240875912408759) internal successors, (154), 137 states have internal predecessors, (154), 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) [2022-11-26 00:31:55,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 154 transitions. [2022-11-26 00:31:55,920 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 154 transitions. Word has length 75 [2022-11-26 00:31:55,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:31:55,921 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 154 transitions. [2022-11-26 00:31:55,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 states have internal predecessors, (50), 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) [2022-11-26 00:31:55,921 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 154 transitions. [2022-11-26 00:31:55,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-26 00:31:55,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:55,921 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:31:55,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-26 00:31:56,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-26 00:31:56,122 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:31:56,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:56,123 INFO L85 PathProgramCache]: Analyzing trace with hash -852878451, now seen corresponding path program 26 times [2022-11-26 00:31:56,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:31:56,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088325701] [2022-11-26 00:31:56,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:56,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:31:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-11-26 00:31:56,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:31:56,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088325701] [2022-11-26 00:31:56,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088325701] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:31:56,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570954072] [2022-11-26 00:31:56,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:31:56,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:56,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:31:56,553 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:31:56,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-26 00:31:56,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:31:56,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:31:56,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 00:31:56,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:31:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-11-26 00:31:57,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:31:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-11-26 00:31:57,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570954072] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:31:57,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [537984187] [2022-11-26 00:31:57,473 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:31:57,474 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:31:57,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:31:57,474 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:31:57,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:31:57,537 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-26 00:31:57,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-26 00:31:57,610 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:31:57,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:31:57,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:31:57,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:57,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:57,700 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:31:57,701 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 250 treesize of output 247 [2022-11-26 00:31:57,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:31:57,897 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:31:58,221 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20471#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:31:58,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:31:58,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:31:58,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2022-11-26 00:31:58,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001214545] [2022-11-26 00:31:58,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:31:58,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-26 00:31:58,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:31:58,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-26 00:31:58,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1249, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:31:58,224 INFO L87 Difference]: Start difference. First operand 138 states and 154 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:31:59,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:31:59,149 INFO L93 Difference]: Finished difference Result 142 states and 158 transitions. [2022-11-26 00:31:59,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-26 00:31:59,150 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-11-26 00:31:59,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:31:59,151 INFO L225 Difference]: With dead ends: 142 [2022-11-26 00:31:59,151 INFO L226 Difference]: Without dead ends: 109 [2022-11-26 00:31:59,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 198 SyntacticMatches, 20 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=517, Invalid=2135, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:31:59,153 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:31:59,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 11 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:31:59,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-26 00:31:59,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 82. [2022-11-26 00:31:59,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 81 states have internal predecessors, (88), 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) [2022-11-26 00:31:59,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2022-11-26 00:31:59,434 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 78 [2022-11-26 00:31:59,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:31:59,435 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2022-11-26 00:31:59,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:31:59,435 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2022-11-26 00:31:59,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-26 00:31:59,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:59,436 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:31:59,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-26 00:31:59,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:59,645 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:31:59,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:59,646 INFO L85 PathProgramCache]: Analyzing trace with hash -329848129, now seen corresponding path program 27 times [2022-11-26 00:31:59,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:31:59,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929753774] [2022-11-26 00:31:59,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:59,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:31:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:32:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 13 proven. 372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:32:27,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:32:27,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929753774] [2022-11-26 00:32:27,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929753774] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:32:27,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544935541] [2022-11-26 00:32:27,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:32:27,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:32:27,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:32:27,048 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:32:27,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-26 00:32:27,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:32:27,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:32:27,266 WARN L261 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 250 conjunts are in the unsatisfiable core [2022-11-26 00:32:27,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:32:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-26 00:32:44,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:33:12,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:33:12,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 190 case distinctions, treesize of input 171 treesize of output 1115 [2022-11-26 00:33:36,847 INFO L321 Elim1Store]: treesize reduction 1050, result has 3.8 percent of original size [2022-11-26 00:33:36,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 190 case distinctions, treesize of input 172 treesize of output 66 [2022-11-26 00:33:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-26 00:33:37,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544935541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:33:37,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [364314913] [2022-11-26 00:33:37,221 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:33:37,221 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:33:37,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:33:37,222 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:33:37,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:33:37,273 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-26 00:33:37,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-26 00:33:37,330 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:33:37,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:33:37,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:33:37,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:37,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:37,405 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:33:37,405 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 250 treesize of output 247 [2022-11-26 00:33:37,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:33:37,579 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:33:39,532 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21621#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:33:39,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:33:39,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:33:39,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 66, 67] total 205 [2022-11-26 00:33:39,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417546443] [2022-11-26 00:33:39,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:33:39,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 205 states [2022-11-26 00:33:39,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:33:39,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2022-11-26 00:33:39,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=42784, Unknown=0, NotChecked=0, Total=43890 [2022-11-26 00:33:39,536 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 205 states, 205 states have (on average 1.0682926829268293) internal successors, (219), 205 states have internal predecessors, (219), 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) [2022-11-26 00:35:17,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:17,947 INFO L93 Difference]: Finished difference Result 425 states and 478 transitions. [2022-11-26 00:35:17,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2022-11-26 00:35:17,948 INFO L78 Accepts]: Start accepts. Automaton has has 205 states, 205 states have (on average 1.0682926829268293) internal successors, (219), 205 states have internal predecessors, (219), 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 81 [2022-11-26 00:35:17,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:17,949 INFO L225 Difference]: With dead ends: 425 [2022-11-26 00:35:17,949 INFO L226 Difference]: Without dead ends: 399 [2022-11-26 00:35:17,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 346 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37109 ImplicationChecksByTransitivity, 130.9s TimeCoverageRelationStatistics Valid=4900, Invalid=115856, Unknown=0, NotChecked=0, Total=120756 [2022-11-26 00:35:17,956 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 12481 mSolverCounterSat, 993 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 13474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 993 IncrementalHoareTripleChecker+Valid, 12481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:17,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 426 Invalid, 13474 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [993 Valid, 12481 Invalid, 0 Unknown, 0 Unchecked, 20.0s Time] [2022-11-26 00:35:17,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-11-26 00:35:18,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 145. [2022-11-26 00:35:18,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.125) internal successors, (162), 144 states have internal predecessors, (162), 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) [2022-11-26 00:35:18,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 162 transitions. [2022-11-26 00:35:18,271 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 162 transitions. Word has length 81 [2022-11-26 00:35:18,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:18,272 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 162 transitions. [2022-11-26 00:35:18,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 205 states, 205 states have (on average 1.0682926829268293) internal successors, (219), 205 states have internal predecessors, (219), 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) [2022-11-26 00:35:18,272 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 162 transitions. [2022-11-26 00:35:18,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-26 00:35:18,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:18,273 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:35:18,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-26 00:35:18,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-26 00:35:18,480 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:18,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:18,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1148199605, now seen corresponding path program 28 times [2022-11-26 00:35:18,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:18,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283331651] [2022-11-26 00:35:18,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:18,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-11-26 00:35:18,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:18,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283331651] [2022-11-26 00:35:18,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283331651] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:35:18,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366656065] [2022-11-26 00:35:18,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:35:18,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:18,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:35:18,941 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:35:18,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-26 00:35:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:19,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:35:19,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:35:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-11-26 00:35:19,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:35:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-11-26 00:35:19,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366656065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:35:19,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1081079302] [2022-11-26 00:35:19,811 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:35:19,812 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:35:19,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:35:19,812 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:35:19,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:35:19,876 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-26 00:35:19,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-26 00:35:19,938 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:35:19,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:35:19,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:35:20,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:20,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:35:20,043 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:35:20,044 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 245 treesize of output 248 [2022-11-26 00:35:20,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:35:20,340 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:35:20,764 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23543#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:35:20,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:35:20,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:35:20,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2022-11-26 00:35:20,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686559040] [2022-11-26 00:35:20,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:35:20,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-26 00:35:20,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:20,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-26 00:35:20,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1429, Unknown=0, NotChecked=0, Total=1806 [2022-11-26 00:35:20,766 INFO L87 Difference]: Start difference. First operand 145 states and 162 transitions. Second operand has 38 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 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) [2022-11-26 00:35:22,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:22,463 INFO L93 Difference]: Finished difference Result 375 states and 418 transitions. [2022-11-26 00:35:22,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-26 00:35:22,464 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 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 82 [2022-11-26 00:35:22,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:22,465 INFO L225 Difference]: With dead ends: 375 [2022-11-26 00:35:22,465 INFO L226 Difference]: Without dead ends: 166 [2022-11-26 00:35:22,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 206 SyntacticMatches, 22 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=608, Invalid=2254, Unknown=0, NotChecked=0, Total=2862 [2022-11-26 00:35:22,467 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 75 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:22,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 19 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [566 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:35:22,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-26 00:35:22,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 148. [2022-11-26 00:35:22,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.1020408163265305) internal successors, (162), 147 states have internal predecessors, (162), 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) [2022-11-26 00:35:22,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 162 transitions. [2022-11-26 00:35:22,838 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 162 transitions. Word has length 82 [2022-11-26 00:35:22,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:22,838 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 162 transitions. [2022-11-26 00:35:22,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 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) [2022-11-26 00:35:22,838 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 162 transitions. [2022-11-26 00:35:22,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-26 00:35:22,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:22,839 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:35:22,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-26 00:35:23,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:23,040 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:23,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:23,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1775246215, now seen corresponding path program 29 times [2022-11-26 00:35:23,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:23,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753467872] [2022-11-26 00:35:23,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:23,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-11-26 00:35:23,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:23,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753467872] [2022-11-26 00:35:23,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753467872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:35:23,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535535740] [2022-11-26 00:35:23,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:35:23,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:23,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:35:23,554 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:35:23,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-26 00:35:23,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-26 00:35:23,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:35:23,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:35:23,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:35:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-11-26 00:35:24,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:35:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-11-26 00:35:24,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535535740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:35:24,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [237272676] [2022-11-26 00:35:24,700 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:35:24,700 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:35:24,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:35:24,701 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:35:24,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:35:24,776 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-26 00:35:24,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-26 00:35:24,844 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:35:24,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:35:24,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 00:35:24,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:24,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:24,953 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:35:24,954 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 250 treesize of output 247 [2022-11-26 00:35:25,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:35:25,171 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:35:25,549 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25139#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:35:25,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:35:25,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:35:25,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2022-11-26 00:35:25,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139101199] [2022-11-26 00:35:25,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:35:25,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-26 00:35:25,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:25,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-26 00:35:25,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=1445, Unknown=0, NotChecked=0, Total=1806 [2022-11-26 00:35:25,552 INFO L87 Difference]: Start difference. First operand 148 states and 162 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 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) [2022-11-26 00:35:26,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:26,692 INFO L93 Difference]: Finished difference Result 152 states and 166 transitions. [2022-11-26 00:35:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-26 00:35:26,693 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 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 85 [2022-11-26 00:35:26,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:26,695 INFO L225 Difference]: With dead ends: 152 [2022-11-26 00:35:26,695 INFO L226 Difference]: Without dead ends: 116 [2022-11-26 00:35:26,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 216 SyntacticMatches, 22 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=603, Invalid=2477, Unknown=0, NotChecked=0, Total=3080 [2022-11-26 00:35:26,697 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:26,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 15 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:35:26,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-26 00:35:26,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 89. [2022-11-26 00:35:26,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0795454545454546) internal successors, (95), 88 states have internal predecessors, (95), 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) [2022-11-26 00:35:26,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2022-11-26 00:35:26,901 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 85 [2022-11-26 00:35:26,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:26,902 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2022-11-26 00:35:26,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 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) [2022-11-26 00:35:26,902 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2022-11-26 00:35:26,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-26 00:35:26,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:26,903 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:35:26,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-26 00:35:27,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f04a38-f9ef-462b-bf85-534e7a85fadb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:27,111 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:27,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:27,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1799556933, now seen corresponding path program 30 times [2022-11-26 00:35:27,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:27,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520120498] [2022-11-26 00:35:27,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:27,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat