./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array8_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array8_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7 --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 06625eaf591a62e295090a882d83c1e11aaafca7ac8895e7d4adcf51d5b26e02 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:46:18,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:46:18,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:46:18,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:46:18,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:46:18,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:46:18,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:46:18,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:46:18,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:46:18,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:46:18,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:46:18,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:46:18,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:46:18,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:46:18,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:46:18,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:46:18,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:46:18,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:46:18,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:46:18,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:46:18,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:46:18,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:46:18,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:46:18,370 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:46:18,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:46:18,374 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:46:18,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:46:18,376 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:46:18,376 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:46:18,382 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:46:18,383 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:46:18,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:46:18,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:46:18,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:46:18,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:46:18,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:46:18,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:46:18,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:46:18,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:46:18,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:46:18,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:46:18,393 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:46:18,446 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:46:18,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:46:18,447 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:46:18,447 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:46:18,453 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:46:18,454 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:46:18,454 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:46:18,454 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:46:18,454 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:46:18,455 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:46:18,455 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:46:18,455 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:46:18,455 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:46:18,455 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:46:18,456 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:46:18,456 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:46:18,456 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:46:18,456 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:46:18,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:46:18,457 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:46:18,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:46:18,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:46:18,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:46:18,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:46:18,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:46:18,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:46:18,459 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:46:18,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:46:18,459 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:46:18,459 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:46:18,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:46:18,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:46:18,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:46:18,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:46:18,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:46:18,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:46:18,461 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:46:18,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:46:18,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:46:18,461 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:46:18,462 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:46:18,462 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06625eaf591a62e295090a882d83c1e11aaafca7ac8895e7d4adcf51d5b26e02 [2021-11-25 19:46:18,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:46:18,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:46:18,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:46:18,730 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:46:18,731 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:46:18,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-patterns/array8_pattern.c [2021-11-25 19:46:18,821 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/data/e59776061/593677c6e55d461194755090e913dfaf/FLAG02808b4c2 [2021-11-25 19:46:19,234 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:46:19,235 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/sv-benchmarks/c/array-patterns/array8_pattern.c [2021-11-25 19:46:19,242 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/data/e59776061/593677c6e55d461194755090e913dfaf/FLAG02808b4c2 [2021-11-25 19:46:19,628 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/data/e59776061/593677c6e55d461194755090e913dfaf [2021-11-25 19:46:19,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:46:19,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:46:19,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:46:19,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:46:19,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:46:19,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:46:19" (1/1) ... [2021-11-25 19:46:19,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1764427c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:19, skipping insertion in model container [2021-11-25 19:46:19,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:46:19" (1/1) ... [2021-11-25 19:46:19,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:46:19,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:46:19,822 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/sv-benchmarks/c/array-patterns/array8_pattern.c[1321,1334] [2021-11-25 19:46:19,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:46:19,854 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:46:19,866 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/sv-benchmarks/c/array-patterns/array8_pattern.c[1321,1334] [2021-11-25 19:46:19,876 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:46:19,893 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:46:19,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:19 WrapperNode [2021-11-25 19:46:19,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:46:19,895 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:46:19,895 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:46:19,895 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:46:19,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:19" (1/1) ... [2021-11-25 19:46:19,908 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:19" (1/1) ... [2021-11-25 19:46:19,930 INFO L137 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2021-11-25 19:46:19,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:46:19,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:46:19,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:46:19,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:46:19,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:19" (1/1) ... [2021-11-25 19:46:19,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:19" (1/1) ... [2021-11-25 19:46:19,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:19" (1/1) ... [2021-11-25 19:46:19,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:19" (1/1) ... [2021-11-25 19:46:19,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:19" (1/1) ... [2021-11-25 19:46:19,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:19" (1/1) ... [2021-11-25 19:46:19,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:19" (1/1) ... [2021-11-25 19:46:19,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:46:19,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:46:19,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:46:19,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:46:19,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:19" (1/1) ... [2021-11-25 19:46:19,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:46:19,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:46:20,017 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:46:20,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:46:20,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:46:20,065 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:46:20,065 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:46:20,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:46:20,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:46:20,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:46:20,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:46:20,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:46:20,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:46:20,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:46:20,143 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:46:20,145 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:46:20,350 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:46:20,404 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:46:20,404 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 19:46:20,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:46:20 BoogieIcfgContainer [2021-11-25 19:46:20,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:46:20,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:46:20,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:46:20,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:46:20,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:46:19" (1/3) ... [2021-11-25 19:46:20,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11226062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:46:20, skipping insertion in model container [2021-11-25 19:46:20,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:19" (2/3) ... [2021-11-25 19:46:20,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11226062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:46:20, skipping insertion in model container [2021-11-25 19:46:20,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:46:20" (3/3) ... [2021-11-25 19:46:20,423 INFO L111 eAbstractionObserver]: Analyzing ICFG array8_pattern.c [2021-11-25 19:46:20,428 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:46:20,428 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:46:20,494 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:46:20,510 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:46:20,510 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:46:20,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:46:20,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:46:20,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:46:20,530 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:46:20,530 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:46:20,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:46:20,536 INFO L85 PathProgramCache]: Analyzing trace with hash -41992950, now seen corresponding path program 1 times [2021-11-25 19:46:20,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:46:20,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040589552] [2021-11-25 19:46:20,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:46:20,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:46:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:46:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:46:20,731 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:46:20,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040589552] [2021-11-25 19:46:20,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040589552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:46:20,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:46:20,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:46:20,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434618251] [2021-11-25 19:46:20,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:46:20,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 19:46:20,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:46:20,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 19:46:20,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:46:20,776 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:46:20,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:46:20,827 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-11-25 19:46:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 19:46:20,833 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-25 19:46:20,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:46:20,840 INFO L225 Difference]: With dead ends: 24 [2021-11-25 19:46:20,848 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 19:46:20,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:46:20,855 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:46:20,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:46:20,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 19:46:20,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-25 19:46:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:46:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-11-25 19:46:20,891 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2021-11-25 19:46:20,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:46:20,893 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-11-25 19:46:20,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:46:20,893 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-11-25 19:46:20,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 19:46:20,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:46:20,895 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:46:20,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:46:20,895 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:46:20,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:46:20,896 INFO L85 PathProgramCache]: Analyzing trace with hash -682917570, now seen corresponding path program 1 times [2021-11-25 19:46:20,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:46:20,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505501037] [2021-11-25 19:46:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:46:20,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:46:20,924 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:46:20,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635633153] [2021-11-25 19:46:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:46:20,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:46:20,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:46:20,927 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:46:20,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:46:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:46:21,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:46:21,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:46:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:46:21,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:46:21,189 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:46:21,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505501037] [2021-11-25 19:46:21,190 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:46:21,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635633153] [2021-11-25 19:46:21,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635633153] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:46:21,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:46:21,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:46:21,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485886634] [2021-11-25 19:46:21,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:46:21,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:46:21,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:46:21,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:46:21,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:46:21,194 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:46:21,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:46:21,268 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-11-25 19:46:21,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:46:21,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-11-25 19:46:21,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:46:21,287 INFO L225 Difference]: With dead ends: 30 [2021-11-25 19:46:21,287 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 19:46:21,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:46:21,290 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:46:21,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 20 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:46:21,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 19:46:21,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-25 19:46:21,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:46:21,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-25 19:46:21,297 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-11-25 19:46:21,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:46:21,297 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-25 19:46:21,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:46:21,298 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-25 19:46:21,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 19:46:21,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:46:21,299 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:46:21,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:46:21,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:46:21,519 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:46:21,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:46:21,520 INFO L85 PathProgramCache]: Analyzing trace with hash -647612129, now seen corresponding path program 1 times [2021-11-25 19:46:21,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:46:21,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612457579] [2021-11-25 19:46:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:46:21,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:46:21,549 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:46:21,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922974822] [2021-11-25 19:46:21,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:46:21,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:46:21,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:46:21,551 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:46:21,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:46:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:46:21,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-25 19:46:21,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:46:21,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-11-25 19:46:21,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:21,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-11-25 19:46:21,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2021-11-25 19:46:22,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:22,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:46:22,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 54 [2021-11-25 19:46:22,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:46:22,542 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-25 19:46:22,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 15 [2021-11-25 19:46:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:46:22,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:46:24,940 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_81 Int) (|ULTIMATE.start_main_~#array1~0#1.offset| Int)) (let ((.cse5 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |ULTIMATE.start_main_~#array1~0#1.offset| .cse5) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse5))) (or (<= (let ((.cse0 (store .cse2 .cse3 v_ArrVal_81))) (+ (select .cse0 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select (select (store .cse1 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array1~0#1.base|) |ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|)) (div (+ c_~ARR_SIZE~0 1) 2)) (let ((.cse4 (= (mod |c_ULTIMATE.start_main_~index~0#1| 2) 0))) (and (or (< (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|) v_ArrVal_81) .cse4) (or (< (select .cse2 .cse3) v_ArrVal_81) (not .cse4))))))))) is different from false [2021-11-25 19:46:35,691 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:46:35,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612457579] [2021-11-25 19:46:35,692 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:46:35,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922974822] [2021-11-25 19:46:35,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922974822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:46:35,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [789861880] [2021-11-25 19:46:35,712 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:46:35,712 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:46:35,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:46:35,722 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:46:35,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:46:35,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:35,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:35,908 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:46:35,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:46:35,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:35,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:35,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2021-11-25 19:46:35,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:35,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:35,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-25 19:46:36,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:36,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:36,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:36,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:36,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:36,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:36,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:46:36,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:36,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:46:36,172 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-25 19:46:36,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-25 19:46:36,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:46:36,299 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:46:36,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 19:46:36,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:46:36,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:46:36,561 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-25 19:46:36,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-25 19:46:36,824 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-25 19:46:36,855 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:46:39,029 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '291#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:46:39,030 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:46:39,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:46:39,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-25 19:46:39,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744897840] [2021-11-25 19:46:39,031 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 19:46:39,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:46:39,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:46:39,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:46:39,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=707, Unknown=3, NotChecked=54, Total=870 [2021-11-25 19:46:39,034 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:46:39,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:46:39,139 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-11-25 19:46:39,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:46:39,140 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-25 19:46:39,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:46:39,142 INFO L225 Difference]: With dead ends: 34 [2021-11-25 19:46:39,142 INFO L226 Difference]: Without dead ends: 31 [2021-11-25 19:46:39,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=116, Invalid=755, Unknown=3, NotChecked=56, Total=930 [2021-11-25 19:46:39,144 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:46:39,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 79 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 39 Unchecked, 0.0s Time] [2021-11-25 19:46:39,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-25 19:46:39,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-11-25 19:46:39,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:46:39,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-25 19:46:39,152 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 18 [2021-11-25 19:46:39,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:46:39,153 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-25 19:46:39,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:46:39,153 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-25 19:46:39,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 19:46:39,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:46:39,154 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:46:39,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 19:46:39,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:46:39,358 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:46:39,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:46:39,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1398625999, now seen corresponding path program 2 times [2021-11-25 19:46:39,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:46:39,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597507841] [2021-11-25 19:46:39,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:46:39,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:46:39,394 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:46:39,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752366666] [2021-11-25 19:46:39,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:46:39,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:46:39,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:46:39,396 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:46:39,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:46:39,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:46:39,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:46:39,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:46:39,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:46:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:46:39,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:46:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:46:39,642 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:46:39,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597507841] [2021-11-25 19:46:39,643 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:46:39,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752366666] [2021-11-25 19:46:39,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752366666] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:46:39,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1515745792] [2021-11-25 19:46:39,646 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:46:39,646 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:46:39,647 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:46:39,647 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:46:39,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:46:39,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:39,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:39,772 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:46:39,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:46:39,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:39,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:39,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2021-11-25 19:46:39,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:39,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:39,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 19:46:39,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:39,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:39,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:46:39,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:46:39,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:46:40,064 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 19:46:40,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2021-11-25 19:46:40,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:46:40,212 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:46:40,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 19:46:40,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:46:40,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:46:40,326 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-25 19:46:40,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-25 19:46:40,441 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-25 19:46:40,470 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:46:41,771 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '517#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:46:41,771 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:46:41,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:46:41,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-25 19:46:41,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696558654] [2021-11-25 19:46:41,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:46:41,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:46:41,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:46:41,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:46:41,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-11-25 19:46:41,773 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:46:41,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:46:41,885 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-11-25 19:46:41,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 19:46:41,885 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2021-11-25 19:46:41,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:46:41,886 INFO L225 Difference]: With dead ends: 37 [2021-11-25 19:46:41,886 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 19:46:41,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-11-25 19:46:41,888 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:46:41,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 48 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:46:41,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 19:46:41,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2021-11-25 19:46:41,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:46:41,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-11-25 19:46:41,893 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 19 [2021-11-25 19:46:41,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:46:41,893 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-11-25 19:46:41,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:46:41,894 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-11-25 19:46:41,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 19:46:41,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:46:41,894 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:46:41,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-25 19:46:42,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:46:42,098 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:46:42,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:46:42,098 INFO L85 PathProgramCache]: Analyzing trace with hash -87694224, now seen corresponding path program 3 times [2021-11-25 19:46:42,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:46:42,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14143770] [2021-11-25 19:46:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:46:42,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:46:42,123 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:46:42,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718393804] [2021-11-25 19:46:42,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:46:42,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:46:42,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:46:42,130 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:46:42,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:46:42,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:46:42,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:46:42,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:46:42,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:46:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:46:42,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:46:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:46:42,330 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:46:42,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14143770] [2021-11-25 19:46:42,331 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:46:42,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718393804] [2021-11-25 19:46:42,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718393804] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:46:42,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1295829088] [2021-11-25 19:46:42,333 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:46:42,334 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:46:42,334 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:46:42,334 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:46:42,334 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:46:42,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:42,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:42,458 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-25 19:46:42,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-25 19:46:42,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:42,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:42,550 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:46:42,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:46:42,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:42,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:42,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-25 19:46:42,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:42,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:42,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:42,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:42,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:42,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:42,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:46:42,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:42,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:46:42,793 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-25 19:46:42,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-25 19:46:42,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:46:42,885 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:46:42,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 19:46:43,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:46:43,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:46:43,137 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-25 19:46:43,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-25 19:46:43,358 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-25 19:46:43,360 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:46:44,783 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '737#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:46:44,783 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:46:44,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:46:44,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-25 19:46:44,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059552865] [2021-11-25 19:46:44,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:46:44,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:46:44,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:46:44,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:46:44,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-11-25 19:46:44,786 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:46:44,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:46:44,880 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-11-25 19:46:44,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:46:44,881 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2021-11-25 19:46:44,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:46:44,882 INFO L225 Difference]: With dead ends: 24 [2021-11-25 19:46:44,882 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 19:46:44,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-11-25 19:46:44,883 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:46:44,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 27 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:46:44,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 19:46:44,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-25 19:46:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:46:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-25 19:46:44,888 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 19 [2021-11-25 19:46:44,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:46:44,888 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-25 19:46:44,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:46:44,889 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-25 19:46:44,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 19:46:44,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:46:44,889 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:46:44,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:46:45,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:46:45,090 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:46:45,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:46:45,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1576211870, now seen corresponding path program 4 times [2021-11-25 19:46:45,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:46:45,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376262872] [2021-11-25 19:46:45,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:46:45,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:46:45,116 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:46:45,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107868971] [2021-11-25 19:46:45,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:46:45,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:46:45,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:46:45,118 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:46:45,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:46:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:46:45,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-25 19:46:45,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:46:45,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-11-25 19:46:45,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:45,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-11-25 19:46:45,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2021-11-25 19:46:45,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-25 19:46:45,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:45,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:45,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-25 19:46:45,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:45,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:45,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:46,008 INFO L354 Elim1Store]: treesize reduction 90, result has 46.1 percent of original size [2021-11-25 19:46:46,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 139 [2021-11-25 19:46:46,712 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-25 19:46:46,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 41 [2021-11-25 19:46:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:46:46,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:47:07,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:47:07,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376262872] [2021-11-25 19:47:07,519 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:47:07,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107868971] [2021-11-25 19:47:07,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107868971] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:47:07,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1918747327] [2021-11-25 19:47:07,521 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:47:07,522 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:47:07,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:47:07,522 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:47:07,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:47:07,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:07,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:07,639 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:47:07,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:47:07,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:07,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:07,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2021-11-25 19:47:07,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:07,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:07,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 19:47:07,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:07,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:07,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:07,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:07,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:07,915 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 19:47:07,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2021-11-25 19:47:08,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:08,059 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:47:08,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 19:47:08,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:08,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:08,148 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-25 19:47:08,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-25 19:47:08,236 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-25 19:47:08,262 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:47:09,985 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '927#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:47:09,985 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:47:09,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:47:09,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-25 19:47:09,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783270431] [2021-11-25 19:47:09,985 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 19:47:09,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 19:47:09,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:47:09,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 19:47:09,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=929, Unknown=3, NotChecked=0, Total=1056 [2021-11-25 19:47:09,987 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:47:10,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:47:10,197 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-11-25 19:47:10,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 19:47:10,199 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-11-25 19:47:10,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:47:10,200 INFO L225 Difference]: With dead ends: 44 [2021-11-25 19:47:10,200 INFO L226 Difference]: Without dead ends: 41 [2021-11-25 19:47:10,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=129, Invalid=990, Unknown=3, NotChecked=0, Total=1122 [2021-11-25 19:47:10,202 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:47:10,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 96 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 116 Invalid, 0 Unknown, 27 Unchecked, 0.2s Time] [2021-11-25 19:47:10,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-25 19:47:10,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2021-11-25 19:47:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:47:10,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-25 19:47:10,210 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2021-11-25 19:47:10,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:47:10,211 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-25 19:47:10,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:47:10,211 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-25 19:47:10,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 19:47:10,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:47:10,212 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:47:10,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:47:10,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 19:47:10,438 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:47:10,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:47:10,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1617693232, now seen corresponding path program 5 times [2021-11-25 19:47:10,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:47:10,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618818358] [2021-11-25 19:47:10,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:10,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:47:10,477 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:47:10,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1042103315] [2021-11-25 19:47:10,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:47:10,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:47:10,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:47:10,483 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:47:10,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:47:10,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:47:10,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:47:10,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:47:10,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:47:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:10,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:47:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:47:10,730 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:47:10,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618818358] [2021-11-25 19:47:10,730 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:47:10,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042103315] [2021-11-25 19:47:10,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042103315] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:47:10,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1190989842] [2021-11-25 19:47:10,732 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:47:10,733 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:47:10,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:47:10,733 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:47:10,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:47:10,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:10,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:10,853 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:47:10,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:47:10,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:10,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:10,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2021-11-25 19:47:10,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:10,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:10,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-25 19:47:11,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:11,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:11,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:11,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:11,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:11,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:11,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:11,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:11,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:11,071 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-25 19:47:11,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-25 19:47:11,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:11,166 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:47:11,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 19:47:11,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:11,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:11,373 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-25 19:47:11,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-25 19:47:11,570 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-25 19:47:11,597 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:47:13,237 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1187#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:47:13,237 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:47:13,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:47:13,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-25 19:47:13,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454203910] [2021-11-25 19:47:13,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:47:13,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:47:13,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:47:13,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:47:13,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-11-25 19:47:13,240 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:47:13,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:47:13,389 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-11-25 19:47:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:47:13,389 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2021-11-25 19:47:13,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:47:13,390 INFO L225 Difference]: With dead ends: 53 [2021-11-25 19:47:13,390 INFO L226 Difference]: Without dead ends: 45 [2021-11-25 19:47:13,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2021-11-25 19:47:13,392 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:47:13,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 54 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:47:13,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-25 19:47:13,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-11-25 19:47:13,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 19:47:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-25 19:47:13,407 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 21 [2021-11-25 19:47:13,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:47:13,408 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-25 19:47:13,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:47:13,408 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-25 19:47:13,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 19:47:13,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:47:13,409 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:47:13,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:47:13,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 19:47:13,616 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:47:13,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:47:13,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1508560721, now seen corresponding path program 6 times [2021-11-25 19:47:13,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:47:13,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808552080] [2021-11-25 19:47:13,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:13,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:47:13,645 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:47:13,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19891008] [2021-11-25 19:47:13,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:47:13,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:47:13,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:47:13,652 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:47:13,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:47:13,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:47:13,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:47:13,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:47:13,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:47:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:13,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:47:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:47:13,907 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:47:13,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808552080] [2021-11-25 19:47:13,907 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:47:13,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19891008] [2021-11-25 19:47:13,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19891008] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:47:13,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1539675306] [2021-11-25 19:47:13,910 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:47:13,910 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:47:13,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:47:13,911 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:47:13,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:47:13,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:13,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:14,040 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-25 19:47:14,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-25 19:47:14,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:14,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:14,146 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:47:14,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:47:14,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:14,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:14,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 19:47:14,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:14,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:14,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:14,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:14,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:14,401 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 19:47:14,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2021-11-25 19:47:14,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:14,528 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:47:14,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 19:47:14,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:14,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:14,612 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-25 19:47:14,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-25 19:47:14,716 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-25 19:47:14,741 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:47:16,035 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1478#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:47:16,036 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:47:16,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:47:16,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-25 19:47:16,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293860312] [2021-11-25 19:47:16,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:47:16,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:47:16,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:47:16,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:47:16,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-11-25 19:47:16,038 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:47:16,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:47:16,180 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-11-25 19:47:16,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:47:16,183 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2021-11-25 19:47:16,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:47:16,184 INFO L225 Difference]: With dead ends: 45 [2021-11-25 19:47:16,184 INFO L226 Difference]: Without dead ends: 42 [2021-11-25 19:47:16,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-11-25 19:47:16,185 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:47:16,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 50 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:47:16,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-25 19:47:16,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-11-25 19:47:16,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 19:47:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-25 19:47:16,193 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 21 [2021-11-25 19:47:16,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:47:16,193 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-25 19:47:16,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:47:16,193 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-25 19:47:16,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 19:47:16,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:47:16,201 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:47:16,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:47:16,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:47:16,417 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:47:16,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:47:16,418 INFO L85 PathProgramCache]: Analyzing trace with hash 479023423, now seen corresponding path program 7 times [2021-11-25 19:47:16,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:47:16,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042878932] [2021-11-25 19:47:16,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:16,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:47:16,470 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:47:16,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940183246] [2021-11-25 19:47:16,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:47:16,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:47:16,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:47:16,472 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:47:16,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:47:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:47:16,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-25 19:47:16,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:47:16,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-11-25 19:47:16,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:16,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 33 [2021-11-25 19:47:16,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 12 [2021-11-25 19:47:16,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-25 19:47:16,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:16,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:16,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-25 19:47:16,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:16,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:16,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:16,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:16,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:16,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:16,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2021-11-25 19:47:17,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:17,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:17,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:17,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:17,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:17,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:17,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:17,422 INFO L354 Elim1Store]: treesize reduction 174, result has 32.8 percent of original size [2021-11-25 19:47:17,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 126 treesize of output 153 [2021-11-25 19:47:20,404 INFO L354 Elim1Store]: treesize reduction 10, result has 92.4 percent of original size [2021-11-25 19:47:20,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 186 treesize of output 216 [2021-11-25 19:47:21,998 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:21,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:47:24,369 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|aux_mod_ULTIMATE.start_main_~index~0#1_40| Int) (|aux_div_ULTIMATE.start_main_~index~0#1_40| Int)) (or (= |aux_mod_ULTIMATE.start_main_~index~0#1_40| 0) (<= (let ((.cse3 (* |aux_mod_ULTIMATE.start_main_~index~0#1_40| 4)) (.cse4 (* |aux_div_ULTIMATE.start_main_~index~0#1_40| 8))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 .cse4) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))))) (let ((.cse1 (store (select .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 .cse4) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|)))) (let ((.cse0 (select (store .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|)))))) (div (+ c_~ARR_SIZE~0 1) 2)) (<= 2 |aux_mod_ULTIMATE.start_main_~index~0#1_40|) (< |aux_mod_ULTIMATE.start_main_~index~0#1_40| 0))) (forall ((|aux_div_ULTIMATE.start_main_~index~0#1_40| Int)) (<= (let ((.cse10 (* |aux_div_ULTIMATE.start_main_~index~0#1_40| 8))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse10) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))))) (let ((.cse6 (let ((.cse8 (select .cse7 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse9 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse10))) (store .cse8 .cse9 (select .cse8 .cse9))))) (let ((.cse5 (select (store .cse7 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse6) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse5 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse6 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse5 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse6 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse5 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse6 |c_ULTIMATE.start_main_~#array2~0#1.offset|)))))) (div (+ c_~ARR_SIZE~0 1) 2)))) is different from false [2021-11-25 19:47:24,525 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:47:24,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042878932] [2021-11-25 19:47:24,525 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:47:24,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940183246] [2021-11-25 19:47:24,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940183246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:47:24,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1188089883] [2021-11-25 19:47:24,527 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:47:24,527 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:47:24,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:47:24,527 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:47:24,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:47:24,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:24,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:24,631 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-25 19:47:24,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-25 19:47:24,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:24,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:24,747 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:47:24,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:47:24,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:24,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:24,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 19:47:24,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:24,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:24,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:24,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:24,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:24,991 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 19:47:24,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2021-11-25 19:47:25,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:25,096 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:47:25,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 19:47:25,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:25,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:25,184 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-25 19:47:25,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-25 19:47:25,272 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-25 19:47:25,293 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:47:26,950 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1740#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:47:26,950 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:47:26,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:47:26,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-25 19:47:26,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539709902] [2021-11-25 19:47:26,951 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 19:47:26,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 19:47:26,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:47:26,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 19:47:26,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=876, Unknown=1, NotChecked=60, Total=1056 [2021-11-25 19:47:26,953 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:47:27,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:47:27,057 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2021-11-25 19:47:27,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 19:47:27,057 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-11-25 19:47:27,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:47:27,058 INFO L225 Difference]: With dead ends: 56 [2021-11-25 19:47:27,058 INFO L226 Difference]: Without dead ends: 53 [2021-11-25 19:47:27,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=119, Invalid=876, Unknown=1, NotChecked=60, Total=1056 [2021-11-25 19:47:27,059 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:47:27,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 140 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 92 Unchecked, 0.1s Time] [2021-11-25 19:47:27,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-25 19:47:27,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-11-25 19:47:27,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 19:47:27,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-11-25 19:47:27,072 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 22 [2021-11-25 19:47:27,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:47:27,072 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-11-25 19:47:27,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:47:27,072 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-11-25 19:47:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 19:47:27,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:47:27,073 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:47:27,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:47:27,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:47:27,278 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:47:27,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:47:27,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1964589743, now seen corresponding path program 8 times [2021-11-25 19:47:27,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:47:27,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457086288] [2021-11-25 19:47:27,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:27,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:47:27,299 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:47:27,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407105742] [2021-11-25 19:47:27,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:47:27,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:47:27,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:47:27,312 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:47:27,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:47:27,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 19:47:27,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:47:27,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:47:27,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:47:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:27,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:47:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:47:27,580 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:47:27,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457086288] [2021-11-25 19:47:27,580 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:47:27,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407105742] [2021-11-25 19:47:27,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407105742] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:47:27,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [31499745] [2021-11-25 19:47:27,583 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:47:27,583 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:47:27,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:47:27,583 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:47:27,584 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:47:27,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:27,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:27,704 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:47:27,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:47:27,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:27,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:27,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2021-11-25 19:47:27,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:27,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:27,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 19:47:27,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:27,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:27,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:27,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:27,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:27,919 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 19:47:27,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2021-11-25 19:47:28,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:28,074 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:47:28,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 19:47:28,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:28,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:28,138 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-25 19:47:28,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-25 19:47:28,206 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-25 19:47:28,226 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:47:29,386 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2060#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:47:29,387 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:47:29,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:47:29,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-25 19:47:29,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388266063] [2021-11-25 19:47:29,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:47:29,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 19:47:29,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:47:29,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 19:47:29,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:47:29,389 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:47:29,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:47:29,602 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2021-11-25 19:47:29,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 19:47:29,602 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-11-25 19:47:29,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:47:29,603 INFO L225 Difference]: With dead ends: 87 [2021-11-25 19:47:29,603 INFO L226 Difference]: Without dead ends: 78 [2021-11-25 19:47:29,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 19:47:29,605 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 75 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:47:29,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 73 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:47:29,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-25 19:47:29,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2021-11-25 19:47:29,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 19:47:29,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2021-11-25 19:47:29,620 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 23 [2021-11-25 19:47:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:47:29,621 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2021-11-25 19:47:29,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:47:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2021-11-25 19:47:29,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 19:47:29,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:47:29,622 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:47:29,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:47:29,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 19:47:29,826 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:47:29,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:47:29,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1375403522, now seen corresponding path program 9 times [2021-11-25 19:47:29,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:47:29,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807139293] [2021-11-25 19:47:29,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:29,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:47:29,859 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:47:29,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2142170563] [2021-11-25 19:47:29,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:47:29,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:47:29,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:47:29,872 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:47:29,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 19:47:29,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:47:29,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:47:29,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-25 19:47:29,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:47:30,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-11-25 19:47:30,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 33 [2021-11-25 19:47:30,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 12 [2021-11-25 19:47:30,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-25 19:47:30,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-25 19:47:30,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 69 [2021-11-25 19:47:30,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 87 [2021-11-25 19:47:30,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:30,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:31,151 INFO L354 Elim1Store]: treesize reduction 226, result has 35.6 percent of original size [2021-11-25 19:47:31,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 13 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 12 case distinctions, treesize of input 144 treesize of output 199 [2021-11-25 19:47:33,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:47:33,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 8 case distinctions, treesize of input 150 treesize of output 154 [2021-11-25 19:47:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:33,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:47:36,432 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|aux_div_ULTIMATE.start_main_~index~0#1_40| Int)) (<= (let ((.cse5 (* |aux_div_ULTIMATE.start_main_~index~0#1_40| 8))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse5) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))))) (let ((.cse1 (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse5))) (store .cse3 .cse4 (select .cse3 .cse4))))) (let ((.cse0 (select (store .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|)))))) (div (+ c_~ARR_SIZE~0 1) 2))) (forall ((|aux_mod_ULTIMATE.start_main_~index~0#1_40| Int) (|aux_div_ULTIMATE.start_main_~index~0#1_40| Int)) (or (= |aux_mod_ULTIMATE.start_main_~index~0#1_40| 0) (<= (let ((.cse9 (* |aux_mod_ULTIMATE.start_main_~index~0#1_40| 4)) (.cse10 (* |aux_div_ULTIMATE.start_main_~index~0#1_40| 8))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse9 .cse10) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))))) (let ((.cse7 (store (select .cse8 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse9 .cse10) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|)))) (let ((.cse6 (select (store .cse8 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse7) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse6 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse7 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse6 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse7 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse7 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse6 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse6 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse7 |c_ULTIMATE.start_main_~#array2~0#1.offset|)))))) (div (+ c_~ARR_SIZE~0 1) 2)) (<= 2 |aux_mod_ULTIMATE.start_main_~index~0#1_40|) (< |aux_mod_ULTIMATE.start_main_~index~0#1_40| 0)))) is different from false [2021-11-25 19:47:36,502 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:47:36,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807139293] [2021-11-25 19:47:36,503 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:47:36,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142170563] [2021-11-25 19:47:36,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142170563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:47:36,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1818271087] [2021-11-25 19:47:36,505 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:47:36,505 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:47:36,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:47:36,505 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:47:36,505 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:47:36,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:36,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:36,615 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-25 19:47:36,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-25 19:47:36,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:36,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:36,701 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:47:36,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:47:36,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:36,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:36,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-25 19:47:36,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:36,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:36,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:36,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:36,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:36,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:36,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:36,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:36,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:36,842 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-25 19:47:36,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-25 19:47:36,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:36,908 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:47:36,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 19:47:37,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:37,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:37,101 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-25 19:47:37,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-25 19:47:37,275 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-25 19:47:37,276 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:47:39,384 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2443#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:47:39,384 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:47:39,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:47:39,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-25 19:47:39,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582424626] [2021-11-25 19:47:39,385 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 19:47:39,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 19:47:39,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:47:39,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 19:47:39,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1051, Unknown=1, NotChecked=66, Total=1260 [2021-11-25 19:47:39,386 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:47:39,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:47:39,652 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-11-25 19:47:39,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 19:47:39,653 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-11-25 19:47:39,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:47:39,654 INFO L225 Difference]: With dead ends: 80 [2021-11-25 19:47:39,654 INFO L226 Difference]: Without dead ends: 77 [2021-11-25 19:47:39,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=142, Invalid=1051, Unknown=1, NotChecked=66, Total=1260 [2021-11-25 19:47:39,655 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:47:39,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 173 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 122 Invalid, 0 Unknown, 118 Unchecked, 0.2s Time] [2021-11-25 19:47:39,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-25 19:47:39,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-11-25 19:47:39,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:47:39,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2021-11-25 19:47:39,671 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 24 [2021-11-25 19:47:39,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:47:39,672 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2021-11-25 19:47:39,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:47:39,672 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2021-11-25 19:47:39,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 19:47:39,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:47:39,673 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:47:39,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:47:39,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 19:47:39,890 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:47:39,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:47:39,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1547988136, now seen corresponding path program 1 times [2021-11-25 19:47:39,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:47:39,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606014640] [2021-11-25 19:47:39,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:39,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:47:39,908 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:47:39,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255790692] [2021-11-25 19:47:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:39,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:47:39,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:47:39,910 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:47:39,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:47:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:47:40,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-25 19:47:40,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:47:40,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-11-25 19:47:40,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:40,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-11-25 19:47:40,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2021-11-25 19:47:40,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-25 19:47:40,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:40,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:40,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-25 19:47:40,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:40,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:40,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:40,610 INFO L354 Elim1Store]: treesize reduction 119, result has 31.2 percent of original size [2021-11-25 19:47:40,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 119 [2021-11-25 19:47:49,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:49,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:50,015 INFO L354 Elim1Store]: treesize reduction 376, result has 16.1 percent of original size [2021-11-25 19:47:50,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 175 treesize of output 174 [2021-11-25 19:47:59,188 INFO L354 Elim1Store]: treesize reduction 76, result has 37.2 percent of original size [2021-11-25 19:47:59,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 139 treesize of output 121 [2021-11-25 19:47:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:59,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:02,196 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|aux_div_ULTIMATE.start_main_#t~nondet6#1_42| Int)) (<= (let ((.cse5 (* |aux_div_ULTIMATE.start_main_#t~nondet6#1_42| 8))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse5) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))))) (let ((.cse0 (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse4 (+ .cse5 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (store .cse3 .cse4 (select .cse3 .cse4))))) (let ((.cse1 (select (store .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse1 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4))))))) (div (+ c_~ARR_SIZE~0 1) 2))) (forall ((|aux_div_ULTIMATE.start_main_#t~nondet6#1_42| Int) (|aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| Int)) (or (<= (let ((.cse9 (* |aux_div_ULTIMATE.start_main_#t~nondet6#1_42| 8)) (.cse10 (* |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| 4))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse9 .cse10) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))))) (let ((.cse7 (store (select .cse8 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ .cse9 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse10) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|)))) (let ((.cse6 (select (store .cse8 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse7) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse6 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse7 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse7 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse6 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4))))))) (div (+ c_~ARR_SIZE~0 1) 2)) (< |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| 0) (= |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| 0) (<= 2 |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42|)))) is different from false [2021-11-25 19:48:04,796 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse20 (= (mod |c_ULTIMATE.start_main_~index~0#1| 2) 0))) (and (or (and (forall ((|aux_div_ULTIMATE.start_main_#t~nondet6#1_42| Int)) (<= (let ((.cse5 (* |aux_div_ULTIMATE.start_main_#t~nondet6#1_42| 8))) (let ((.cse2 (let ((.cse7 (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))) (let ((.cse6 (let ((.cse9 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse9) .cse7)))) (store .cse8 |c_ULTIMATE.start_main_~#array2~0#1.base| (store (select .cse8 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse9) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))))))) (store .cse6 |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select .cse6 |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse5) .cse7)))))) (let ((.cse1 (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse4 (+ .cse5 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (store .cse3 .cse4 (select .cse3 .cse4))))) (let ((.cse0 (select (store .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|)))))) (div (+ c_~ARR_SIZE~0 1) 2))) (forall ((|aux_div_ULTIMATE.start_main_#t~nondet6#1_42| Int) (|aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| Int)) (or (<= (let ((.cse13 (* |aux_div_ULTIMATE.start_main_#t~nondet6#1_42| 8)) (.cse14 (* |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| 4)) (.cse15 (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))) (let ((.cse12 (let ((.cse17 (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))) (let ((.cse16 (let ((.cse19 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse18 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse19) .cse17)))) (store .cse18 |c_ULTIMATE.start_main_~#array2~0#1.base| (store (select .cse18 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse19) .cse15)))))) (store .cse16 |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select .cse16 |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse13 .cse14) .cse17)))))) (let ((.cse10 (store (select .cse12 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ .cse13 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse14) .cse15))) (let ((.cse11 (select (store .cse12 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse10) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse10 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse10 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse11 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse11 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|))))) (div (+ c_~ARR_SIZE~0 1) 2)) (< |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| 0) (= |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| 0) (<= 2 |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42|)))) .cse20) (or (and (forall ((|aux_div_ULTIMATE.start_main_#t~nondet6#1_42| Int)) (<= (let ((.cse26 (* |aux_div_ULTIMATE.start_main_#t~nondet6#1_42| 8))) (let ((.cse23 (let ((.cse28 (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))) (let ((.cse27 (let ((.cse32 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse29 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse32) .cse28)))) (store .cse29 |c_ULTIMATE.start_main_~#array2~0#1.base| (let ((.cse30 (select .cse29 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse31 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse32))) (store .cse30 .cse31 (select .cse30 .cse31)))))))) (store .cse27 |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select .cse27 |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse26) .cse28)))))) (let ((.cse22 (let ((.cse24 (select .cse23 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse25 (+ .cse26 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (store .cse24 .cse25 (select .cse24 .cse25))))) (let ((.cse21 (select (store .cse23 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse22) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse21 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse22 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse22 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse21 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4))))))) (div (+ c_~ARR_SIZE~0 1) 2))) (forall ((|aux_div_ULTIMATE.start_main_#t~nondet6#1_42| Int) (|aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| Int)) (or (< |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| 0) (= |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| 0) (<= 2 |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42|) (<= (let ((.cse36 (* |aux_div_ULTIMATE.start_main_#t~nondet6#1_42| 8)) (.cse37 (* |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| 4))) (let ((.cse35 (let ((.cse39 (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))) (let ((.cse38 (let ((.cse43 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse40 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse43) .cse39)))) (store .cse40 |c_ULTIMATE.start_main_~#array2~0#1.base| (let ((.cse41 (select .cse40 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse42 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse43))) (store .cse41 .cse42 (select .cse41 .cse42)))))))) (store .cse38 |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select .cse38 |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse36 .cse37) .cse39)))))) (let ((.cse34 (store (select .cse35 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ .cse36 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse37) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|)))) (let ((.cse33 (select (store .cse35 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse34) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse33 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse34 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse34 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse33 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|))))) (div (+ c_~ARR_SIZE~0 1) 2))))) (not .cse20)))) is different from false [2021-11-25 19:48:13,167 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|aux_mod_ULTIMATE.start_main_~index~0#1_40| Int) (|aux_div_ULTIMATE.start_main_~index~0#1_40| Int)) (let ((.cse22 (+ (* 2 |aux_div_ULTIMATE.start_main_~index~0#1_40|) |aux_mod_ULTIMATE.start_main_~index~0#1_40|))) (or (and (forall ((|aux_div_ULTIMATE.start_main_#t~nondet6#1_42| Int) (|aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| Int)) (or (< |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| 0) (= |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| 0) (<= 2 |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42|) (<= (let ((.cse3 (* |aux_div_ULTIMATE.start_main_#t~nondet6#1_42| 8)) (.cse4 (* |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| 4)) (.cse5 (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))) (let ((.cse2 (let ((.cse7 (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))) (let ((.cse6 (let ((.cse9 (* |aux_mod_ULTIMATE.start_main_~index~0#1_40| 4)) (.cse10 (* |aux_div_ULTIMATE.start_main_~index~0#1_40| 8))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse9 .cse10) .cse7)))) (store .cse8 |c_ULTIMATE.start_main_~#array2~0#1.base| (store (select .cse8 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse9 .cse10) .cse5)))))) (store .cse6 |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select .cse6 |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 .cse4) .cse7)))))) (let ((.cse0 (store (select .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ .cse3 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse4) .cse5))) (let ((.cse1 (select (store .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse0 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse1 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|))))) (div (+ c_~ARR_SIZE~0 1) 2)))) (forall ((|aux_div_ULTIMATE.start_main_#t~nondet6#1_42| Int)) (<= (let ((.cse16 (* |aux_div_ULTIMATE.start_main_#t~nondet6#1_42| 8))) (let ((.cse13 (let ((.cse18 (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))) (let ((.cse17 (let ((.cse20 (* |aux_mod_ULTIMATE.start_main_~index~0#1_40| 4)) (.cse21 (* |aux_div_ULTIMATE.start_main_~index~0#1_40| 8))) (let ((.cse19 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse20 .cse21) .cse18)))) (store .cse19 |c_ULTIMATE.start_main_~#array2~0#1.base| (store (select .cse19 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse20 .cse21) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))))))) (store .cse17 |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select .cse17 |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse16) .cse18)))))) (let ((.cse12 (let ((.cse14 (select .cse13 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse15 (+ .cse16 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (store .cse14 .cse15 (select .cse14 .cse15))))) (let ((.cse11 (select (store .cse13 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse12) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse11 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse11 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse12 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse12 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4))))))) (div (+ c_~ARR_SIZE~0 1) 2)))) (= |aux_mod_ULTIMATE.start_main_~index~0#1_40| 0) (< .cse22 0) (<= c_~ARR_SIZE~0 .cse22) (<= 2 |aux_mod_ULTIMATE.start_main_~index~0#1_40|) (< |aux_mod_ULTIMATE.start_main_~index~0#1_40| 0)))) (forall ((|aux_div_ULTIMATE.start_main_~index~0#1_40| Int)) (let ((.cse23 (* 2 |aux_div_ULTIMATE.start_main_~index~0#1_40|))) (or (< .cse23 0) (and (forall ((|aux_div_ULTIMATE.start_main_#t~nondet6#1_42| Int)) (<= (let ((.cse29 (* |aux_div_ULTIMATE.start_main_#t~nondet6#1_42| 8))) (let ((.cse26 (let ((.cse31 (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))) (let ((.cse30 (let ((.cse35 (* |aux_div_ULTIMATE.start_main_~index~0#1_40| 8))) (let ((.cse32 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse35) .cse31)))) (store .cse32 |c_ULTIMATE.start_main_~#array2~0#1.base| (let ((.cse33 (select .cse32 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse34 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse35))) (store .cse33 .cse34 (select .cse33 .cse34)))))))) (store .cse30 |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select .cse30 |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse29) .cse31)))))) (let ((.cse24 (let ((.cse27 (select .cse26 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse28 (+ .cse29 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (store .cse27 .cse28 (select .cse27 .cse28))))) (let ((.cse25 (select (store .cse26 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse24) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse24 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse25 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse25 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse24 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4))))))) (div (+ c_~ARR_SIZE~0 1) 2))) (forall ((|aux_div_ULTIMATE.start_main_#t~nondet6#1_42| Int) (|aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| Int)) (or (< |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| 0) (<= (let ((.cse39 (* |aux_div_ULTIMATE.start_main_#t~nondet6#1_42| 8)) (.cse40 (* |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| 4))) (let ((.cse38 (let ((.cse42 (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))) (let ((.cse41 (let ((.cse46 (* |aux_div_ULTIMATE.start_main_~index~0#1_40| 8))) (let ((.cse43 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse46) .cse42)))) (store .cse43 |c_ULTIMATE.start_main_~#array2~0#1.base| (let ((.cse44 (select .cse43 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse45 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse46))) (store .cse44 .cse45 (select .cse44 .cse45)))))))) (store .cse41 |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select .cse41 |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse39 .cse40) .cse42)))))) (let ((.cse37 (store (select .cse38 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ .cse39 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse40) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|)))) (let ((.cse36 (select (store .cse38 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse37) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse36 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse37 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse37 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse36 |c_ULTIMATE.start_main_~#array1~0#1.offset|)))))) (div (+ c_~ARR_SIZE~0 1) 2)) (= |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| 0) (<= 2 |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42|)))) (<= c_~ARR_SIZE~0 .cse23))))) is different from false [2021-11-25 19:48:13,210 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:13,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606014640] [2021-11-25 19:48:13,210 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:48:13,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255790692] [2021-11-25 19:48:13,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255790692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:13,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [162687562] [2021-11-25 19:48:13,212 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:48:13,212 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:13,212 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:13,213 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:13,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:13,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:13,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:13,321 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:48:13,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:48:13,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:13,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:13,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2021-11-25 19:48:13,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:13,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:13,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-25 19:48:13,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:13,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:13,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:13,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:13,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:13,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:13,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:13,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:13,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:13,525 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-25 19:48:13,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-25 19:48:13,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:13,630 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:48:13,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 19:48:13,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:13,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:13,820 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-25 19:48:13,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-25 19:48:25,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:25,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:25,172 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-25 19:48:25,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-25 19:48:25,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:25,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:25,298 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-25 19:48:25,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-25 19:48:25,444 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-25 19:48:25,465 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:26,618 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2835#(and (<= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 0 |#NULL.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= 0 |ULTIMATE.start_main_~#array2~0#1.offset|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.offset|) (<= |#NULL.base| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= 0 |#NULL.offset|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 19:48:26,619 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:48:26,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:48:26,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-25 19:48:26,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516472597] [2021-11-25 19:48:26,619 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 19:48:26,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 19:48:26,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:26,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 19:48:26,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=929, Unknown=13, NotChecked=192, Total=1260 [2021-11-25 19:48:26,621 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:48:26,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:26,751 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2021-11-25 19:48:26,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 19:48:26,752 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-11-25 19:48:26,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:26,753 INFO L225 Difference]: With dead ends: 87 [2021-11-25 19:48:26,753 INFO L226 Difference]: Without dead ends: 80 [2021-11-25 19:48:26,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=126, Invalid=929, Unknown=13, NotChecked=192, Total=1260 [2021-11-25 19:48:26,754 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:26,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 113 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 87 Unchecked, 0.1s Time] [2021-11-25 19:48:26,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-25 19:48:26,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-11-25 19:48:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 58 states have internal predecessors, (68), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 19:48:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2021-11-25 19:48:26,771 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 26 [2021-11-25 19:48:26,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:26,771 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2021-11-25 19:48:26,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:48:26,771 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2021-11-25 19:48:26,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 19:48:26,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:26,773 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:26,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:26,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:26,978 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:26,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:26,978 INFO L85 PathProgramCache]: Analyzing trace with hash 311929296, now seen corresponding path program 10 times [2021-11-25 19:48:26,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:26,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632188162] [2021-11-25 19:48:26,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:26,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:26,992 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:48:26,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522907527] [2021-11-25 19:48:26,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:48:26,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:26,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:27,007 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:27,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:48:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:27,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:48:27,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:27,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:27,294 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:48:27,294 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:27,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632188162] [2021-11-25 19:48:27,294 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:48:27,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522907527] [2021-11-25 19:48:27,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522907527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:27,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [673424596] [2021-11-25 19:48:27,296 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:48:27,296 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:27,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:27,297 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:27,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:27,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:27,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:27,405 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-25 19:48:27,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-25 19:48:27,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:27,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:27,511 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:48:27,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:48:27,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:27,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:27,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 19:48:27,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:27,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:27,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:27,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:27,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:27,685 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 19:48:27,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2021-11-25 19:48:27,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:27,776 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:48:27,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 19:48:27,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:27,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:27,860 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-25 19:48:27,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-25 19:48:27,929 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-25 19:48:27,949 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:29,279 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3262#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:48:29,279 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:48:29,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:48:29,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-25 19:48:29,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798177723] [2021-11-25 19:48:29,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:48:29,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 19:48:29,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:29,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 19:48:29,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2021-11-25 19:48:29,280 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:48:29,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:29,693 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2021-11-25 19:48:29,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 19:48:29,693 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-11-25 19:48:29,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:29,694 INFO L225 Difference]: With dead ends: 120 [2021-11-25 19:48:29,694 INFO L226 Difference]: Without dead ends: 110 [2021-11-25 19:48:29,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=344, Invalid=1636, Unknown=0, NotChecked=0, Total=1980 [2021-11-25 19:48:29,696 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 93 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:29,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 124 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:48:29,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-25 19:48:29,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 86. [2021-11-25 19:48:29,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 65 states have internal predecessors, (76), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-25 19:48:29,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2021-11-25 19:48:29,714 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 25 [2021-11-25 19:48:29,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:29,715 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2021-11-25 19:48:29,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:48:29,715 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2021-11-25 19:48:29,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 19:48:29,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:29,716 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:29,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:29,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:29,922 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:29,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:29,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1835979633, now seen corresponding path program 11 times [2021-11-25 19:48:29,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:29,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289502022] [2021-11-25 19:48:29,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:29,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:29,939 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:48:29,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149006570] [2021-11-25 19:48:29,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:48:29,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:29,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:29,970 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:29,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 19:48:30,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 19:48:30,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:48:30,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:48:30,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:30,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:48:30,443 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:30,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289502022] [2021-11-25 19:48:30,444 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:48:30,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149006570] [2021-11-25 19:48:30,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149006570] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:30,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2031771746] [2021-11-25 19:48:30,446 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:48:30,446 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:30,446 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:30,446 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:30,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:30,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:30,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:30,551 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:48:30,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:48:30,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:30,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:30,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2021-11-25 19:48:30,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:30,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:30,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-25 19:48:30,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:30,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:30,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:30,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:30,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:30,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:30,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:30,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:30,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:30,748 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-25 19:48:30,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-25 19:48:30,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:30,835 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:48:30,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 19:48:30,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:30,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:30,988 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-25 19:48:30,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-25 19:48:31,137 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-25 19:48:31,163 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:32,695 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3782#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:48:32,695 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:48:32,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:48:32,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-25 19:48:32,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726405906] [2021-11-25 19:48:32,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:48:32,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 19:48:32,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:32,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 19:48:32,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-11-25 19:48:32,696 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:48:32,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:32,928 INFO L93 Difference]: Finished difference Result 107 states and 115 transitions. [2021-11-25 19:48:32,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 19:48:32,929 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-11-25 19:48:32,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:32,937 INFO L225 Difference]: With dead ends: 107 [2021-11-25 19:48:32,937 INFO L226 Difference]: Without dead ends: 104 [2021-11-25 19:48:32,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 19:48:32,939 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 52 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:32,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 79 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:48:32,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-25 19:48:32,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 80. [2021-11-25 19:48:32,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 61 states have internal predecessors, (71), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 19:48:32,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-11-25 19:48:32,965 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 25 [2021-11-25 19:48:32,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:32,965 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-11-25 19:48:32,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:48:32,966 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-11-25 19:48:32,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 19:48:32,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:32,968 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:33,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:33,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 19:48:33,194 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:33,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:33,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1081028257, now seen corresponding path program 12 times [2021-11-25 19:48:33,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:33,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797040035] [2021-11-25 19:48:33,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:33,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:33,213 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:48:33,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584955424] [2021-11-25 19:48:33,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:48:33,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:33,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:33,214 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:33,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 19:48:33,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:48:33,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:48:33,387 WARN L261 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-25 19:48:33,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:33,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-11-25 19:48:33,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 33 [2021-11-25 19:48:33,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2021-11-25 19:48:33,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 12 [2021-11-25 19:48:33,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 12 [2021-11-25 19:48:33,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-25 19:48:33,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 69 [2021-11-25 19:48:33,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 87 [2021-11-25 19:48:33,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 111 [2021-11-25 19:48:34,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:34,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:34,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:34,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:34,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:34,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:34,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:34,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:34,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:34,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:34,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:34,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:34,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:34,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:34,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:34,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:34,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:34,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:34,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:34,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:34,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:34,866 INFO L354 Elim1Store]: treesize reduction 294, result has 33.6 percent of original size [2021-11-25 19:48:34,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 162 treesize of output 229 [2021-11-25 19:48:44,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:48:44,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 11 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 10 case distinctions, treesize of input 180 treesize of output 188 [2021-11-25 19:48:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:45,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:49,848 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|aux_mod_ULTIMATE.start_main_~index~0#1_40| Int) (|aux_div_ULTIMATE.start_main_~index~0#1_40| Int) (aux_div_~ARR_SIZE~0_25 Int)) (let ((.cse0 (* 2 aux_div_~ARR_SIZE~0_25)) (.cse1 (+ (* 2 |aux_div_ULTIMATE.start_main_~index~0#1_40|) |aux_mod_ULTIMATE.start_main_~index~0#1_40|))) (or (<= .cse0 4) (= |aux_mod_ULTIMATE.start_main_~index~0#1_40| 0) (< .cse1 0) (<= 2 |aux_mod_ULTIMATE.start_main_~index~0#1_40|) (<= (let ((.cse5 (* |aux_mod_ULTIMATE.start_main_~index~0#1_40| 4)) (.cse6 (* |aux_div_ULTIMATE.start_main_~index~0#1_40| 8))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse5 .cse6) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))))) (let ((.cse3 (store (select .cse4 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse5 .cse6) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|)))) (let ((.cse2 (select (store .cse4 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse3) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse3 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse2 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse3 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse3 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 16)) (select .cse3 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 16)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse3 |c_ULTIMATE.start_main_~#array2~0#1.offset|)))))) aux_div_~ARR_SIZE~0_25) (<= .cse0 .cse1) (< |aux_mod_ULTIMATE.start_main_~index~0#1_40| 0)))) (forall ((|aux_div_ULTIMATE.start_main_~index~0#1_40| Int)) (let ((.cse7 (let ((.cse13 (* |aux_div_ULTIMATE.start_main_~index~0#1_40| 8))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse13) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|))))) (let ((.cse9 (let ((.cse11 (select .cse10 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse12 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse13))) (store .cse11 .cse12 (select .cse11 .cse12))))) (let ((.cse8 (select (store .cse10 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse9) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse8 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse9 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse9 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 16)) (select .cse8 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse8 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse9 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse9 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse8 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse8 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 16)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse9 |c_ULTIMATE.start_main_~#array2~0#1.offset|)))))))) (or (<= .cse7 3) (<= .cse7 (+ |aux_div_ULTIMATE.start_main_~index~0#1_40| 1)) (< (* 2 |aux_div_ULTIMATE.start_main_~index~0#1_40|) 0))))) is different from false [2021-11-25 19:48:49,858 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:49,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797040035] [2021-11-25 19:48:49,858 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:48:49,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584955424] [2021-11-25 19:48:49,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584955424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:49,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [443329136] [2021-11-25 19:48:49,860 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:48:49,861 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:49,861 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:49,861 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:49,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:49,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:49,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:49,952 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:48:49,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:48:49,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:49,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:49,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2021-11-25 19:48:49,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:50,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:50,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 19:48:50,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:50,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:50,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:50,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:50,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:50,189 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 19:48:50,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2021-11-25 19:48:50,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:50,297 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:48:50,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 19:48:50,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:50,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:50,389 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-25 19:48:50,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-25 19:48:50,472 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-25 19:48:50,492 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:52,613 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4237#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:48:52,613 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:48:52,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:48:52,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-25 19:48:52,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318896723] [2021-11-25 19:48:52,614 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 19:48:52,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 19:48:52,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:52,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 19:48:52,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1469, Unknown=7, NotChecked=78, Total=1722 [2021-11-25 19:48:52,616 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:48:53,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:53,136 INFO L93 Difference]: Finished difference Result 98 states and 109 transitions. [2021-11-25 19:48:53,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 19:48:53,136 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-11-25 19:48:53,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:53,137 INFO L225 Difference]: With dead ends: 98 [2021-11-25 19:48:53,137 INFO L226 Difference]: Without dead ends: 95 [2021-11-25 19:48:53,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=195, Invalid=1694, Unknown=7, NotChecked=84, Total=1980 [2021-11-25 19:48:53,139 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:53,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 197 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 152 Invalid, 0 Unknown, 169 Unchecked, 0.2s Time] [2021-11-25 19:48:53,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-25 19:48:53,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2021-11-25 19:48:53,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 states have internal predecessors, (78), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-25 19:48:53,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2021-11-25 19:48:53,159 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 26 [2021-11-25 19:48:53,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:53,160 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2021-11-25 19:48:53,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:48:53,160 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2021-11-25 19:48:53,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 19:48:53,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:53,161 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:53,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:53,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 19:48:53,374 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:53,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:53,374 INFO L85 PathProgramCache]: Analyzing trace with hash 654361477, now seen corresponding path program 2 times [2021-11-25 19:48:53,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:53,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076765309] [2021-11-25 19:48:53,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:53,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:53,400 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:48:53,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434715556] [2021-11-25 19:48:53,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:48:53,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:53,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:53,404 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:53,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6c4ed01-2f99-4ea8-b2e2-ee2958b47d75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 19:48:53,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 19:48:53,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:48:53,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-25 19:48:53,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:53,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-11-25 19:48:53,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:53,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 33 [2021-11-25 19:48:53,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 12 [2021-11-25 19:48:53,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-25 19:48:53,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:53,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2021-11-25 19:48:53,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:53,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-11-25 19:48:53,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:53,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:53,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 19:48:53,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:53,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2021-11-25 19:48:53,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:53,915 INFO L354 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2021-11-25 19:48:53,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 40 [2021-11-25 19:48:53,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:53,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:53,946 INFO L354 Elim1Store]: treesize reduction 80, result has 17.5 percent of original size [2021-11-25 19:48:53,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 76 [2021-11-25 19:48:57,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,197 INFO L354 Elim1Store]: treesize reduction 217, result has 35.8 percent of original size [2021-11-25 19:48:57,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 136 treesize of output 192 [2021-11-25 19:52:34,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:52:34,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:52:34,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:52:35,260 INFO L354 Elim1Store]: treesize reduction 544, result has 41.1 percent of original size [2021-11-25 19:52:35,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 39 case distinctions, treesize of input 451 treesize of output 619